chemspider.com Website Information

Daily Unique Visits: 70,924

Daily Page Views: 425,544

Income Per Day: $851

Estimated Value: $612,720

This website is located in United Kingdom and is using following IP address 78.25.196.143. See the complete list of popular websites hosted in United Kingdom.

chemspider.com is registered under .COM top-level domain. Please check other sites in .COM zone.

Website chemspider.com is using the following name servers:

a6-66.akam.net
a22-67.akam.net
a28-64.akam.net
a3-65.akam.net
a7-67.akam.net
a1-90.akam.net

and is probably hosted by Timico Limited. See the full list of other websites hosted by Timico Limited.

The highest website chemspider.com position in Alexa rank database was 17734 and the lowest rank position was 20222. Current position of chemspider.com in Alexa rank database is 20222.

Desktop speed score of chemspider.com (77/100) is better than the results of 63.93% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of chemspider.com (97/100) is better than the results of 49.9% of other sites and means that the page is mobile-friendly.

Mobile speed score of chemspider.com (62/100) is better than the results of 59.44% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

chemspider.com Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.

chemspider.com whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.

Domain Name: CHEMSPIDER.COM
Registry Domain ID: 656884984_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.domaindiscover.com
Registrar URL: http://tierra.net
Updated Date: 2023-08-09T13:26:07Z
Creation Date: 2006-11-04T03:00:18Z
Registry Expiry Date: 2025-11-04T03:00:18Z
Registrar: DomainSpot LLC
Registrar IANA ID: 86
Registrar Abuse Contact Email: icann-abuse-reports@tierra.net
Registrar Abuse Contact Phone: 6193932105
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: A1-90.AKAM.NET
Name Server: A22-67.AKAM.NET
Name Server: A28-64.AKAM.NET
Name Server: A3-65.AKAM.NET
Name Server: A6-66.AKAM.NET
Name Server: A7-67.AKAM.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-09-12T05:26:10Z

chemspider.com server information

Servers Location

chemspider.com desktop page speed rank

Last tested: 2019-12-11

Desktop Speed Medium

77/100

chemspider.com Desktop Speed Test Quick Summary

priority - 12Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

http://www.chemspider.com/Scripts/WebForms/MsAjax/MicrosoftAjax.js (expiration not specified)
http://www.chemspider.com/Scripts/WebForms/MsAjax/MicrosoftAjaxWebForms.js (expiration not specified)
http://www.chemspider.com/css/chemspider.widgets.min.css (expiration not specified)
http://www.chemspider.com/css/cs.compoundinfo.css (expiration not specified)
http://www.chemspider.com/css/ct.communitytagging.css (expiration not specified)
http://www.chemspider.com/i/rss.png (expiration not specified)
http://www.chemspider.com/i/sponsors/gga.jpg (expiration not specified)
http://www.chemspider.com/i/sponsors/waters.png (expiration not specified)
http://www.chemspider.com/js/jquery.chemspider.min.js (expiration not specified)
http://www.chemspider.com/responsive/images/header-bg-blue2.jpg (expiration not specified)
http://www.chemspider.com/rsc.org/core/images/icons/chevron-right-light.png (expiration not specified)
http://www.chemspider.com/rsc.org/core/images/icons/cross-light.png (expiration not specified)
http://www.chemspider.com/rsc.org/core/images/icons/hamburger-light.png (expiration not specified)
http://www.chemspider.com/rsc.org/core/images/icons/help-blue.png (expiration not specified)
http://www.chemspider.com/rsc.org/core/images/icons/profile-light.png (expiration not specified)
http://www.chemspider.com/rsc.org/core/images/icons/search-light.png (expiration not specified)
http://www.chemspider.com/rsc.org/core/images/themes/light/masthead-bg.png (expiration not specified)
http://static.hotjar.com/c/hotjar-963523.js?sv=5 (60 seconds)
https://www.googletagmanager.com/gtm.js?id=GTM-NBMLLNP (15 minutes)
https://www.googletagservices.com/tag/js/gpt.js (15 minutes)
https://www.google.com/jsapi (60 minutes)
https://www.google.com/uds/?file=search&v=1&output…3Dtrue&nooldnames=true (60 minutes)
http://www.google-analytics.com/ga.js (2 hours)
https://js-agent.newrelic.com/nr-1153.min.js (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 33 blocking script resources and 20 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://www.chemspider.com/scripts.js?version=20150206
http://www.chemspider.com/js/utils.js?version=20150206
http://www.chemspider.com/js/jquery.1.8.2/js/jquer…in.js?version=20150206
http://www.chemspider.com/js/jquery.1.8.2/js/jquer…in.js?version=20150206
http://www.chemspider.com/js/jquery.cookie.js?version=20150206
http://www.chemspider.com/js/jquery_mobile.1.4.5/j…in.js?version=20150206
http://www.chemspider.com/js/yahoo-dom-event.js?version=20150206
http://www.chemspider.com/js/inlineHelp.js?version=20150206
http://www.chemspider.com/jsmol/JSmol.min.nojq.js?version=20150206
http://www.chemspider.com/rsc.org/core/js/rsc-ui.js?version=20190625
http://www.chemspider.com/rsc.org/core/js/rsc-ui-m…ad.js?version=20150206
http://www.chemspider.com/responsive/js/chemspider.js?version=20150206
http://www.chemspider.com/js/FooTable-2/js/footable.js?version=20150206
http://www.chemspider.com/js/content_loader.js?version=20150206
http://www.chemspider.com/js/infobox2.js?version=20150206
http://www.chemspider.com/js/google_search.js?version=20150206
http://www.chemspider.com/js/jquery.print_area.js?version=20150206
http://www.chemspider.com/js/infotab.js?version=20150206
https://www.google.com/uds/?file=search&v=1&output…3Dtrue&nooldnames=true
https://www.google.com/uds/api/search/1.0/bb262118…6c7b45/default+en.I.js
http://www.chemspider.com/WebResource.axd?d=TzhW4U…1&t=637088639380000000
http://www.chemspider.com/js/jquery.chemspider.min.js
http://www.chemspider.com/Scripts/WebForms/MsAjax/MicrosoftAjax.js
http://www.chemspider.com/Scripts/WebForms/MsAjax/MicrosoftAjaxWebForms.js
http://www.chemspider.com/ScriptResource.axd?d=dnN…XQ2&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=Dzj…s-0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=LMe…X20&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=5os…6A0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=n6l…tg2&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=nku…UR0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=7HV…fO0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=gC-…Ib0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=mv8…6y0&t=ffffffffcfeeeb28

Optimize CSS Delivery of the following:

http://www.chemspider.com/js/jquery.1.9.0/themes/b…m.css?version=20150206
http://www.chemspider.com/js/jquery.1.9.0/themes/b…m.css?version=20150206
https://www.rsc-cdn.org/global/webfonts/museo.css?version=20150206
http://www.chemspider.com/rsc.org/core/css/rsc-ui.css?version=20150206
http://www.chemspider.com/rsc.org/core/css/rsc-ui-…t.css?version=20150206
http://www.chemspider.com/rsc.org/core/css/rsc-ui-…s.css?version=20150206
http://www.chemspider.com/rsc.org/core/css/rsc-ui-…d.css?version=20190625
http://www.chemspider.com/rsc.org/core/css/rsc-ui-…r.css?version=20190625
http://www.chemspider.com/rsc.org/core/css/rsc-the…e.css?version=20150206
http://www.chemspider.com/responsive/css/chemspider-ui.css?version=20151708
http://www.chemspider.com/responsive/css/chemspider.css?version=20150206
http://www.chemspider.com/responsive/css/ie-fix.css?version=20150206
http://www.chemspider.com/js/FooTable-2/css/footab…e.css?version=20150206
http://www.chemspider.com/academic_search.css?version=20150206
http://www.chemspider.com/responsive/css/pt.css?version=20150206
http://www.chemspider.com/google.css?version=20150206
http://www.chemspider.com/css/ct.communitytagging.css
http://www.chemspider.com/css/cs.compoundinfo.css
http://www.chemspider.com/css/chemspider.widgets.min.css
http://www.chemspider.com/WebResource.axd?d=2yL9EC…1&t=636060034340000000

priority - 6Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 55.8KiB (77% reduction).

Compressing http://www.chemspider.com/i/sponsors/gga.jpg could save 24.4KiB (86% reduction).
Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/help-blue.png could save 9.8KiB (95% reduction).
Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/search-light.png could save 4.9KiB (93% reduction).
Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/profile-light.png could save 4.4KiB (96% reduction).
Compressing http://www.chemspider.com/i/sponsors/waters.png could save 3.7KiB (33% reduction).
Compressing and resizing https://www.rsc-cdn.org/global/header-footer/images/icons/twitter.png could save 2.9KiB (68% reduction).
Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/chevron-right-light.png could save 1.9KiB (94% reduction).
Compressing and resizing https://www.rsc-cdn.org/global/header-footer/images/icons/linkedin.png could save 1.6KiB (66% reduction).
Compressing and resizing https://www.rsc-cdn.org/global/header-footer/images/icons/youtube.png could save 1KiB (53% reduction).
Compressing and resizing https://www.rsc-cdn.org/global/header-footer/images/icons/facebook.png could save 921B (61% reduction).
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Compressing http://www.chemspider.com/rsc.org/core/images/themes/light/masthead-bg.png could save 116B (52% reduction).

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 14KiB (37% reduction).

Minifying http://www.chemspider.com/js/FooTable-2/js/footable.js?version=20150206 could save 3.8KiB (44% reduction) after compression.
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Minifying http://www.chemspider.com/js/jquery.print_area.js?version=20150206 could save 934B (40% reduction) after compression.
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Minifying http://www.chemspider.com/js/infotab.js?version=20150206 could save 561B (38% reduction).
Minifying http://www.chemspider.com/js/infobox2.js?version=20150206 could save 398B (39% reduction) after compression.
Minifying http://www.chemspider.com/responsive/js/chemspider.js?version=20150206 could save 369B (19% reduction) after compression.
Minifying http://www.chemspider.com/rsc.org/core/js/rsc-ui.js?version=20190625 could save 273B (50% reduction).
Minifying http://www.chemspider.com/js/inlineHelp.js?version=20150206 could save 254B (22% reduction) after compression.

priority - 1Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 5.5KiB (20% reduction).

Minifying http://www.chemspider.com/responsive/css/chemspider.css?version=20150206 could save 1.8KiB (22% reduction) after compression.
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Minifying http://www.chemspider.com/rsc.org/core/css/rsc-ui.css?version=20150206 could save 575B (19% reduction) after compression.
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Minifying http://www.chemspider.com/css/ct.communitytagging.css could save 392B (21% reduction) after compression.
Minifying http://www.chemspider.com/responsive/css/chemspider-ui.css?version=20151708 could save 274B (19% reduction) after compression.
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Minifying http://www.chemspider.com/css/cs.compoundinfo.css could save 160B (28% reduction).
Minifying http://www.chemspider.com/academic_search.css?version=20150206 could save 151B (14% reduction) after compression.

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 4.6KiB (66% reduction).

Compressing http://www.chemspider.com/js/google_search.js?version=20150206 could save 1.6KiB (76% reduction).
Compressing http://www.chemspider.com/rsc.org/core/js/rsc-ui-m…ad.js?version=20150206 could save 1.6KiB (71% reduction).
Compressing http://www.chemspider.com/js/infotab.js?version=20150206 could save 848B (57% reduction).
Compressing http://www.chemspider.com/css/cs.compoundinfo.css could save 352B (60% reduction).
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chemspider.com Desktop Resource Breakdown

Total Resources	109
Number of Hosts	16
Static Resources	56
JavaScript Resources	47
CSS Resources	20

chemspider.com mobile page speed rank

Last tested: 2019-12-11

Mobile Speed Bad

62/100

chemspider.com Mobile Speed Test Quick Summary

priority - 32Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 33 blocking script resources and 20 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://www.chemspider.com/scripts.js?version=20150206
http://www.chemspider.com/js/utils.js?version=20150206
http://www.chemspider.com/js/jquery.1.8.2/js/jquer…in.js?version=20150206
http://www.chemspider.com/js/jquery.1.8.2/js/jquer…in.js?version=20150206
http://www.chemspider.com/js/jquery.cookie.js?version=20150206
http://www.chemspider.com/js/jquery_mobile.1.4.5/j…in.js?version=20150206
http://www.chemspider.com/js/yahoo-dom-event.js?version=20150206
http://www.chemspider.com/js/inlineHelp.js?version=20150206
http://www.chemspider.com/jsmol/JSmol.min.nojq.js?version=20150206
http://www.chemspider.com/rsc.org/core/js/rsc-ui.js?version=20190625
http://www.chemspider.com/rsc.org/core/js/rsc-ui-m…ad.js?version=20150206
http://www.chemspider.com/responsive/js/chemspider.js?version=20150206
http://www.chemspider.com/js/FooTable-2/js/footable.js?version=20150206
http://www.chemspider.com/js/content_loader.js?version=20150206
http://www.chemspider.com/js/infobox2.js?version=20150206
http://www.chemspider.com/js/google_search.js?version=20150206
http://www.chemspider.com/js/jquery.print_area.js?version=20150206
http://www.chemspider.com/js/infotab.js?version=20150206
https://www.google.com/uds/?file=search&v=1&output…3Dtrue&nooldnames=true
https://www.google.com/uds/api/search/1.0/bb262118…6c7b45/default+en.I.js
http://www.chemspider.com/WebResource.axd?d=TzhW4U…1&t=636996244220000000
http://www.chemspider.com/js/jquery.chemspider.min.js
http://www.chemspider.com/Scripts/WebForms/MsAjax/MicrosoftAjax.js
http://www.chemspider.com/Scripts/WebForms/MsAjax/MicrosoftAjaxWebForms.js
http://www.chemspider.com/ScriptResource.axd?d=dnN…XQ2&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=Dzj…s-0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=LMe…X20&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=5os…6A0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=n6l…tg2&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=nku…UR0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=7HV…fO0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=gC-…Ib0&t=ffffffffcfeeeb28
http://www.chemspider.com/ScriptResource.axd?d=mv8…6y0&t=ffffffffcfeeeb28

Optimize CSS Delivery of the following:

priority - 18Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 12Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 115.6KiB (75% reduction).

Compressing https://tpc.googlesyndication.com/simgad/12368211981589198452 could save 62.3KiB (78% reduction).
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Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/help-blue.png could save 9.5KiB (92% reduction).
Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/search-light.png could save 4.9KiB (93% reduction).
Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/profile-light.png could save 4.2KiB (93% reduction).
Compressing http://www.chemspider.com/i/sponsors/waters.png could save 3.7KiB (33% reduction).
Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/chevron-right-light.png could save 1.9KiB (94% reduction).
Compressing https://www.rsc-cdn.org/global/header-footer/images/icons/twitter.png could save 1.7KiB (39% reduction).
Compressing and resizing http://www.chemspider.com/rsc.org/core/images/icons/hamburger-light.png could save 1.2KiB (88% reduction).
Compressing https://www.rsc-cdn.org/global/header-footer/images/icons/linkedin.png could save 765B (30% reduction).
Compressing https://www.rsc-cdn.org/global/header-footer/images/icons/youtube.png could save 566B (30% reduction).
Compressing https://www.rsc-cdn.org/global/header-footer/images/icons/facebook.png could save 231B (16% reduction).
Compressing http://www.chemspider.com/responsive/images/header-bg-blue2.jpg could save 126B (28% reduction).
Compressing http://www.chemspider.com/rsc.org/core/images/themes/light/masthead-bg.png could save 116B (52% reduction).

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 14KiB (37% reduction).

Minifying http://www.chemspider.com/js/FooTable-2/js/footable.js?version=20150206 could save 3.8KiB (44% reduction) after compression.
Minifying http://www.chemspider.com/js/utils.js?version=20150206 could save 3.7KiB (50% reduction) after compression.
Minifying http://www.chemspider.com/js/jquery.cookie.js?version=20150206 could save 1KiB (68% reduction) after compression.
Minifying http://www.chemspider.com/js/jquery.print_area.js?version=20150206 could save 934B (40% reduction) after compression.
Minifying http://www.chemspider.com/scripts.js?version=20150206 could save 800B (24% reduction) after compression.
Minifying http://www.chemspider.com/js/google_search.js?version=20150206 could save 795B (37% reduction).
Minifying http://www.chemspider.com/rsc.org/core/js/rsc-ui-m…ad.js?version=20150206 could save 624B (28% reduction).
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Minifying http://www.chemspider.com/rsc.org/core/js/rsc-ui.js?version=20190625 could save 273B (50% reduction).
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priority - 1Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 5.5KiB (20% reduction).

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 4.6KiB (66% reduction).

chemspider.com Mobile Resource Breakdown

Total Resources	104
Number of Hosts	15
Static Resources	56
JavaScript Resources	47
CSS Resources	20

chemspider.com mobile page usability

Last tested: 2019-12-11

Mobile Usability Good

97/100

chemspider.com Mobile Usability Test Quick Summary

priority - 2Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <form id="aspnetForm">Jump to main c…number: 207890</form> is close to 1 other tap targets.

The tap target <a id="btnSearchHelp" href="#">Systematic Nam…InChI or CSID</a> is close to 1 other tap targets.

The tap target <a href="https://www.rsc.org/">Home</a> and 11 others are close to other tap targets.

chemspider.com HTML validation

Errors

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Line: 3 Column: 1 - 121
"... <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <..."

Any “input” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.

Line: 160 Column: 29 - 201
"... <input type="text" name="searchRsc" id="searchRsc" placeholder="Search rsc.org" onkeypress="javascript:if (event.keyCode == 13){$('#btnSearchRsc').click();return false;}" /> ..." Line: 197 Column: 21 - 267
"... <input name="ctl00$ctl00$qs_query" type="text" id="ctl00_ctl00_qs_query" name="qs_query" placeholder="Search ChemSpider" onKeyPress="javascript:if (event.keyCode == 13) { __doPostBack('ctl00$ctl00$qs_query',''); return false; }" /><butto..."

The “label” element may contain at most one “button”, “input”, “meter”, “output”, “progress”, “select”, or “textarea” descendant.

Line: 161 Column: 29 - 226
"... <button name="btnSearchRsc" id="btnSearchRsc" class="blue bg" type="button" onclick="if($('#searchRsc').val()!=''){window.location='http://www.rsc.org/search-results/?q=' + $('#searchRsc').val();}"> ..." Line: 197 Column: 268 - 275
"...lse; }" /><button><img s..."

Any “button” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 175 Column: 291 - 358
"...spx"><img height="24" src="/rsc.org/core/images/icons/profile-light.png"></a></li> ..." Line: 187 Column: 271 - 349
"...spx"><img height="12" width="12" src="/rsc.org/core/images/icons/profile-light.png"> Sign in</a..." Line: 197 Column: 276 - 478
".../><button><img src="/rsc.org/core/images/icons/search-light.png" id="ctl00_ctl00_search_btn" width="24" height="24" class="btn-icon" onClick="javascript: __doPostBack('ctl00$ctl00$qs_query','')" /></butt..."

Element “ul” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Line: 180 Column: 6 - 19
"...v"> <ul class="n"> ..."

Duplicate attribute “name”.

Line: 197 Column: - 98
"..._qs_query" name="qs_query" pla..."

The element “button” must not appear as a descendant of the “a” element.

Line: 336 Column: 9 - 45
"...> <button type="button" class="button">Visit ..."

The “width” attribute on the “table” element is obsolete. Use CSS instead.

Line: 375 Column: 3 - 65
"... <div> <table width="100%" cellspacing="0" cellpadding="0" border="0"> <t..." Line: 379 Column: 6 - 68
"...r;"> <table width="100%" cellspacing="0" cellpadding="0" border="0"> ..."

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

The “align” attribute on the “tr” element is obsolete. Use CSS instead.

Line: 377 Column: 11 - 22
"... <tbody> <tr align="center"> <..." Line: 381 Column: 14 - 25
"... <tbody> <tr align="center"> ..." Line: 388 Column: 12 - 25
"... </tr> <tr align="center"> ..."

The “font” element is obsolete. Use CSS instead.

Line: 384 Column: 10 - 29
"... <font color="white">Sponso..."

Attribute “scale” not allowed on element “img” at this point.

Line: 391 Column: 10 - 100
"... <img src="./i/sponsors/waters.png" alt="Waters - The Science of What's Possible" scale="0"> ..." Line: 397 Column: 10 - 83
"... <img src="./i/sponsors/gga.jpg" alt="GGA Software Services LLC" scale="0"> ..."

No “p” element in scope but a “p” end tag seen.

Line: 420 Column: 9 - 12
"...> </p> </di..." Line: 434 Column: 17 - 20
"... </p> ..." Line: 441 Column: 17 - 20
"... </p> ..." Line: 448 Column: 17 - 20
"... </p> ..."

The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.

Line: 159 Column: 25 - 43
"... <label for="text1"> ..." Line: 196 Column: 17 - 35
"... <label for="text1"> ..."

Warnings

The “type” attribute is unnecessary for JavaScript resources.

Line: 11 Column: 30 - 60
"...00_Head1"><script type="text/javascript">window..." Line: 11 Column: 342 - 372
"...}</script><script type="text/javascript">window..." Line: 15 Column: 5 - 92
"... <script type="text/javascript" language="javascript" src="/scripts.js?version=20150206"></scri..." Line: 16 Column: 5 - 93
"...ript> <script type="text/javascript" language="javascript" src="/js/utils.js?version=20150206"></scri..." Line: 17 Column: 5 - 120
"...ript> <script type="text/javascript" language="javascript" src="/js/jquery.1.8.2/js/jquery-1.8.2.min.js?version=20150206"></scri..." Line: 18 Column: 5 - 130
"...ript> <script type="text/javascript" language="javascript" src="/js/jquery.1.8.2/js/jquery-ui-1.9.0.custom.min.js?version=20150206"></scri..." Line: 19 Column: 5 - 101
"...ript> <script type="text/javascript" language="javascript" src="/js/jquery.cookie.js?version=20150206"></scri..." Line: 20 Column: 5 - 132
"...ript> <script type="text/javascript" language="javascript" src="/js/jquery_mobile.1.4.5/jquery.mobile.custom.min.js?version=20150206"></scri..." Line: 22 Column: 5 - 103
"...ipt> <script type="text/javascript" language="javascript" src="/js/yahoo-dom-event.js?version=20150206"></scri..." Line: 23 Column: 5 - 98
"...ript> <script type="text/javascript" language="javascript" src="/js/inlineHelp.js?version=20150206"></scri..." Line: 24 Column: 5 - 105
"...ript> <script type="text/javascript" language="javascript" src="/jsmol/JSmol.min.nojq.js?version=20150206"></scri..." Line: 29 Column: 5 - 107
"..." /> <script type="text/javascript" language="javascript" src="/rsc.org/core/js/rsc-ui.js?version=20190625"></scri..." Line: 30 Column: 5 - 116
"...ript> <script type="text/javascript" language="javascript" src="/rsc.org/core/js/rsc-ui-masthead.js?version=20150206"></scri..." Line: 34 Column: 2 - 106
"... /> <script type="text/javascript" language="javascript" src="/responsive/js/chemspider.js?version=20150206"></scri..." Line: 37 Column: 5 - 88
"...s" /> <script src="/js/FooTable-2/js/footable.js?version=20150206" type="text/javascript"></scri..." Line: 68 Column: 2 - 99
"...ctra" /> <script type="text/javascript" language="javascript" src="/js/content_loader.js?version=20150206"></scri..." Line: 69 Column: 2 - 93
".../script> <script type="text/javascript" language="javascript" src="/js/infobox2.js?version=20150206"></scri..." Line: 70 Column: 2 - 98
".../script> <script type="text/javascript" language="javascript" src="/js/google_search.js?version=20150206"></scri..." Line: 71 Column: 2 - 67
".../script> <script src="https://www.google.com/jsapi" type="text/javascript"></scri..." Line: 72 Column: 2 - 102
".../script> <script type="text/javascript" language="javascript" src="/js/jquery.print_area.js?version=20150206"></scri..." Line: 73 Column: 2 - 92
".../script> <script type="text/javascript" language="javascript" src="/js/infotab.js?version=20150206"></scri..." Line: 74 Column: 2 - 54
".../script> <script type="text/javascript" language="javascript"> // ..." Line: 80 Column: 1 - 31
".../script> <script type="text/javascript"> v..." Line: 125 Column: 1 - 31
"...ow=" /> <script type="text/javascript"> //<![..." Line: 130 Column: 1 - 78
".../script> <script src="Scripts/WebForms/MsAjax/MicrosoftAjax.js" type="text/javascript"></scri..." Line: 131 Column: 1 - 218
"...</script> <script src="/ScriptResource.axd?d=dnNiWO4HagdSpPUHkEDdIG56ZBFOTaENoEBIY1JIP8Qmtl5DZpO8xZlQcihHQIJ89qlKIP4tWKCkPwG2AfGoozOH4UtzfCzA91uufP1ztKJWejUBVzuyaMSzrHuMUsONlnREXQ2&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 132 Column: 1 - 196
"...</script> <script src="/ScriptResource.axd?d=DzjFLKty4CuSt44Bf_CLyEE400RvVtt5LDpobDyoqtAgFb6s6eJzmBe03cQY39P9C46qweJjiaK6J-luXGMGB1sx0Pca9K9mqTNAT9mqhp7WIBs-0&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 133 Column: 1 - 196
"...</script> <script src="/ScriptResource.axd?d=LMeGEw6vpbASFkbWbiBgpc6eMpJsP8pY93EmyaOIFsNhs_xSXspwMaz7bIUKA8goKjkDJOaXEqIRATz6GUGNbnSRdTdqEu0kFh6LbRAyZUivCuX20&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 134 Column: 1 - 196
"...</script> <script src="/ScriptResource.axd?d=5os4VpX8jLthwQSpSAodwZfHCjVwTcU2TWN6WnnU83u_pc5MPwQrQgkzoUTlUXl7Av4TE0z3qnzfBxl55AeaO24GBqpBkLGgoSzcqus8t6w6Un6A0&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 135 Column: 1 - 218
"...</script> <script src="/ScriptResource.axd?d=n6lVsbe1jR0Jywf7krbCIHjSCKIHzML-7hhdOHxYH3-Y7NT9s03wBwEXCOwt_g1e6R2akkKPV0NAjhh7t4IZfb8RTBISmoOils7LyzF2P-zWZFGTo335ovFNR8Ar5o5q1yZ5tg2&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 136 Column: 1 - 196
"...</script> <script src="/ScriptResource.axd?d=nkuKGLMXUJs1AR5Ru1x_dlP-_gKq8x7zx9oYKHRNNnUzvjMg0hs6mKZ-Z4fIufqav3jX0txlcT0PL__P9zfu19FJV34dh3oepWO65ts-3Vj35yUR0&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 137 Column: 1 - 196
"...</script> <script src="/ScriptResource.axd?d=7HVm9KRPSNoZUTuPO5ZhNUHqDtJP1z8duAhyG7CnLMdKe7syK7vvGgjpeVcGxRB-qYq75TNF1Z3S09yIeErTPFHang2SUOBPqB-h4FZQaIPs28fO0&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 138 Column: 1 - 196
"...</script> <script src="/ScriptResource.axd?d=gC-RtiucH_R72z52L-aCpc9jyEDuw4JzjMjDoOqFzzjDAHNhkOCzuLdUpku44V9kaTxRgB04g1GnqCbNGkj32P-qG1rFs76pvo9KPXqx2HSKepIb0&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 139 Column: 1 - 196
"...</script> <script src="/ScriptResource.axd?d=mv8lpt3E7IN4c6hhWIyJKOnBiBRsB5bEvWIWUFdh3CAj9HwHSGXZQCO5ATcuK6sS3I0Tt8EWjQQOoomZTKlnG9jz1JeMRWDWlVspBtOcNZ-wEu6y0&t=ffffffffcfeeeb28" type="text/javascript"></scri..." Line: 512 Column: 1 - 31
"...iv> <script type="text/javascript"> //<![..."

The “language” attribute on the “script” element is obsolete. You can safely omit it.

Line: 15 Column: 5 - 92
"... <script type="text/javascript" language="javascript" src="/scripts.js?version=20150206"></scri..." Line: 16 Column: 5 - 93
"...ript> <script type="text/javascript" language="javascript" src="/js/utils.js?version=20150206"></scri..." Line: 17 Column: 5 - 120
"...ript> <script type="text/javascript" language="javascript" src="/js/jquery.1.8.2/js/jquery-1.8.2.min.js?version=20150206"></scri..." Line: 18 Column: 5 - 130
"...ript> <script type="text/javascript" language="javascript" src="/js/jquery.1.8.2/js/jquery-ui-1.9.0.custom.min.js?version=20150206"></scri..." Line: 19 Column: 5 - 101
"...ript> <script type="text/javascript" language="javascript" src="/js/jquery.cookie.js?version=20150206"></scri..." Line: 20 Column: 5 - 132
"...ript> <script type="text/javascript" language="javascript" src="/js/jquery_mobile.1.4.5/jquery.mobile.custom.min.js?version=20150206"></scri..." Line: 22 Column: 5 - 103
"...ipt> <script type="text/javascript" language="javascript" src="/js/yahoo-dom-event.js?version=20150206"></scri..." Line: 23 Column: 5 - 98
"...ript> <script type="text/javascript" language="javascript" src="/js/inlineHelp.js?version=20150206"></scri..." Line: 24 Column: 5 - 105
"...ript> <script type="text/javascript" language="javascript" src="/jsmol/JSmol.min.nojq.js?version=20150206"></scri..." Line: 29 Column: 5 - 107
"..." /> <script type="text/javascript" language="javascript" src="/rsc.org/core/js/rsc-ui.js?version=20190625"></scri..." Line: 30 Column: 5 - 116
"...ript> <script type="text/javascript" language="javascript" src="/rsc.org/core/js/rsc-ui-masthead.js?version=20150206"></scri..." Line: 34 Column: 2 - 106
"... /> <script type="text/javascript" language="javascript" src="/responsive/js/chemspider.js?version=20150206"></scri..." Line: 68 Column: 2 - 99
"...ctra" /> <script type="text/javascript" language="javascript" src="/js/content_loader.js?version=20150206"></scri..." Line: 69 Column: 2 - 93
".../script> <script type="text/javascript" language="javascript" src="/js/infobox2.js?version=20150206"></scri..." Line: 70 Column: 2 - 98
".../script> <script type="text/javascript" language="javascript" src="/js/google_search.js?version=20150206"></scri..." Line: 72 Column: 2 - 102
".../script> <script type="text/javascript" language="javascript" src="/js/jquery.print_area.js?version=20150206"></scri..." Line: 73 Column: 2 - 92
".../script> <script type="text/javascript" language="javascript" src="/js/infotab.js?version=20150206"></scri..." Line: 74 Column: 2 - 54
".../script> <script type="text/javascript" language="javascript"> // ..."

“label” element with multiple labelable descendants.

Line: 159 Column: 25 - 43
"... <label for="text1"> ..." Line: 196 Column: 17 - 35
"... <label for="text1"> ..."

Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.

Line: 9 Column: 21 - 64
"...IE)]><!--> <html xmlns="http://www.w3.org/1999/xhtml"><!--<!..."

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chemspider.com Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.

chemspider.com TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.

CHEMSPIDER.COM ChemSpider | Search and share chemistry

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chemspider.com desktop page speed rank

chemspider.com Desktop Speed Test Quick Summary

priority - 12Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 33 blocking script resources and 20 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 6Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 55.8KiB (77% reduction).

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 14KiB (37% reduction).

priority - 1Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 5.5KiB (20% reduction).

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 4.6KiB (66% reduction).

chemspider.com Desktop Resource Breakdown

chemspider.com mobile page speed rank

chemspider.com Mobile Speed Test Quick Summary

priority - 32Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 33 blocking script resources and 20 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 18Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

priority - 12Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 115.6KiB (75% reduction).

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 14KiB (37% reduction).

priority - 1Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 5.5KiB (20% reduction).

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 4.6KiB (66% reduction).

chemspider.com Mobile Resource Breakdown

chemspider.com mobile page usability

chemspider.com Mobile Usability Test Quick Summary

priority - 2Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

chemspider.com HTML validation

Errors

Almost standards mode doctype. Expected “<!DOCTYPE html>”.

Any “input” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.

The “label” element may contain at most one “button”, “input”, “meter”, “output”, “progress”, “select”, or “textarea” descendant.

Any “button” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Element “ul” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)

Duplicate attribute “name”.

The element “button” must not appear as a descendant of the “a” element.

The “width” attribute on the “table” element is obsolete. Use CSS instead.

The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.

The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.

The “border” attribute on the “table” element is obsolete. Use CSS instead.

The “align” attribute on the “tr” element is obsolete. Use CSS instead.

The “font” element is obsolete. Use CSS instead.

Attribute “scale” not allowed on element “img” at this point.

No “p” element in scope but a “p” end tag seen.

The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.

Warnings

The “type” attribute is unnecessary for JavaScript resources.

The “language” attribute on the “script” element is obsolete. You can safely omit it.

“label” element with multiple labelable descendants.

Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.