4.3 sec in total
333 ms
3.8 sec
195 ms
Visit chemspider.com now to see the best up-to-date Chem Spider content for United States and also check out these interesting facts you probably never knew about chemspider.com
ChemSpider is a free chemical structure database providing fast access to over 100 million structures, properties and associated information.
Visit chemspider.comWe analyzed Chemspider.com page load time and found that the first response time was 333 ms and then it took 4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
chemspider.com performance score
name
value
score
weighting
Value9.5 s
0/100
10%
Value11.9 s
0/100
25%
Value10.0 s
9/100
10%
Value1,260 ms
19/100
30%
Value0
100/100
15%
Value16.2 s
6/100
10%
333 ms
540 ms
468 ms
126 ms
443 ms
Our browser made a total of 92 requests to load all elements on the main page. We found that 65% of them (60 requests) were addressed to the original Chemspider.com, 12% (11 requests) were made to Rsc-cdn.org and 7% (6 requests) were made to Cf.kampyle.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Chemspider.com.
Page size can be reduced by 165.0 kB (29%)
574.2 kB
409.2 kB
In fact, the total size of Chemspider.com main page is 574.2 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 50% of websites need less resources to load. Javascripts take 271.6 kB which makes up the majority of the site volume.
Potential reduce by 36.3 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 36.3 kB or 72% of the original size.
Potential reduce by 38.0 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Chem Spider needs image optimization as it can save up to 38.0 kB or 20% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 61.1 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 61.1 kB or 22% of the original size.
Potential reduce by 29.5 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Chemspider.com needs all CSS files to be minified and compressed as it can save up to 29.5 kB or 49% of the original size.
Number of requests can be reduced by 52 (61%)
85
33
The browser has sent 85 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chem Spider. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 35 to 1 for JavaScripts and from 19 to 1 for CSS and as a result speed up the page load time.
chemspider.com
333 ms
www.chemspider.com
540 ms
authorization
468 ms
RSCLoginCallback
126 ms
www.chemspider.com
443 ms
jquery-ui-1.9.0.custom.css
226 ms
ip-jquery-ui-1.9.0.custom.css
221 ms
scripts.js
222 ms
utils.js
243 ms
jquery-1.8.2.min.js
392 ms
jquery-ui-1.9.0.custom.min.js
466 ms
jquery.cookie.js
336 ms
jquery.mobile.custom.min.js
382 ms
yahoo-dom-event.js
444 ms
inlineHelp.js
359 ms
JSmol.min.nojq.js
676 ms
museo.css
182 ms
rsc-ui.css
509 ms
rsc-ui-layout.css
511 ms
rsc-ui-controls.css
509 ms
rsc-ui-masthead.css
558 ms
rsc-ui-footer.css
588 ms
rsc-theme-blue.css
630 ms
rsc-ui.js
644 ms
rsc-ui-masthead.js
634 ms
chemspider-ui.css
670 ms
chemspider.css
710 ms
ie-fix.css
762 ms
chemspider.js
788 ms
footable.core.css
758 ms
footable.js
941 ms
k_button.css
233 ms
academic_search.css
792 ms
pt.css
853 ms
google.css
884 ms
ct.communitytagging.css
734 ms
cs.compoundinfo.css
753 ms
content_loader.js
883 ms
infobox2.js
892 ms
google_search.js
901 ms
jsapi
36 ms
jquery.print_area.js
968 ms
infotab.js
1014 ms
WebResource.axd
967 ms
ScriptResource.axd
1291 ms
k_button.js
16 ms
k_push.js
17 ms
ScriptResource.axd
934 ms
ScriptResource.axd
865 ms
ScriptResource.axd
879 ms
ScriptResource.axd
1007 ms
ScriptResource.axd
950 ms
ScriptResource.axd
813 ms
ScriptResource.axd
824 ms
ScriptResource.axd
942 ms
15 ms
default+en.I.js
7 ms
ga.js
37 ms
rsc-logo-ftr.png
7 ms
en-orange-corner-low-right.gif
11 ms
cross-light.png
196 ms
search-light.png
365 ms
rsc-tab-dark.png
437 ms
hamburger-light.png
309 ms
profile-light.png
363 ms
help-blue.png
460 ms
icon-rss.png
373 ms
CSDocs_Sponsors_waters_stacked_120.png
492 ms
CSDocs_Sponsors_gga_logo.jpg
582 ms
chevron-right-light.png
443 ms
rsc-logo-ftr.png
502 ms
queens-award-ftr.png
5 ms
facebook.png
13 ms
twitter.png
21 ms
linkedin.png
22 ms
youtube.png
23 ms
googleplus.png
20 ms
__utm.gif
12 ms
collect
54 ms
ga-audiences
17 ms
header-bg-blue2.jpg
263 ms
masthead-bg.png
263 ms
1223161995@TopRight,Left,BottomRight,Top
295 ms
MuseoSans_300-webfont.svg
10 ms
MuseoSans_700-webfont.svg
9 ms
MuseoSans_500-webfont.svg
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091530---Teacher-Training-Scholarship_CW-Leaderboard-banner_728x90px.gif
53 ms
Agilent_MPU_5977B-300x250-1A.jpg
63 ms
MC_600x500_Submit-Banner-ads.jpg
79 ms
Agilent_5977B-300x100-Animated-1D.gif
36 ms
k_logo.gif
10 ms
k_help.gif
216 ms
chemspider.com accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Image elements do not have [alt] attributes
Links do not have a discernible name
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Some elements have a [tabindex] value greater than 0
chemspider.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
chemspider.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
robots.txt is not valid
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Image elements do not have [alt] attributes
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chemspider.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Chemspider.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
chemspider.com
Open Graph description is not detected on the main page of Chem Spider. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: