Tools & Wizards About Us
a2bchem.com screenshot

Report Summary

  • 57

    Performance

    Renders faster than
    73% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

a2bchem.com

Building Blocks | Catalysts | Inhibitors | A2B Chem

Page Load Speed

2 sec in total

First Response

155 ms

Resources Loaded

1.6 sec

Page Rendered

183 ms

a2bchem.com screenshot

About Website

Click here to check amazing A2B Chem content. Otherwise, check out these important facts you probably never knew about a2bchem.com

Catalog of over 800,000 products including research chemicals,intermediates,building blocks,etc. Pre-packed and ready to ship.

Visit a2bchem.com

Key Findings

We analyzed A2bchem.com page load time and found that the first response time was 155 ms and then it took 1.8 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

a2bchem.com performance score

57

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

23/100

10%

LCP (Largest Contentful Paint)

Value7.0 s

6/100

25%

SI (Speed Index)

Value4.5 s

73/100

10%

TBT (Total Blocking Time)

Value250 ms

84/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value6.3 s

61/100

10%

Network Requests Diagram

a2bchem.com

155 ms

a2bchem.com

270 ms

www.a2bchem.com

384 ms

style.css

69 ms

layui.css

142 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 97% of them (36 requests) were addressed to the original A2bchem.com, 3% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (411 ms) belongs to the original domain A2bchem.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 220.0 kB (28%)

Content Size

793.1 kB

After Optimization

573.2 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of A2bchem.com main page is 793.1 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. 35% of websites need less resources to load. Images take 461.1 kB which makes up the majority of the site volume.

HTML Optimization

-92%

Potential reduce by 218.4 kB

  • Original 236.2 kB
  • After minification 104.7 kB
  • After compression 17.8 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. This page needs HTML code to be minified as it can gain 131.5 kB, which is 56% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 218.4 kB or 92% of the original size.

Image Optimization

-0%

Potential reduce by 44 B

  • Original 461.1 kB
  • After minification 461.0 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. A2B Chem images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 632 B

  • Original 72.0 kB
  • After minification 72.0 kB
  • After compression 71.3 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. This website has mostly compressed JavaScripts.

CSS Optimization

-4%

Potential reduce by 872 B

  • Original 23.8 kB
  • After minification 23.8 kB
  • After compression 23.0 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. A2bchem.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 10 (33%)

Requests Now

30

After Optimization

20

  • Images
  • JavaScript
  • CSS

The browser has sent 30 CSS, Javascripts, AJAX and image requests in order to completely render the main page of A2B Chem. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

a2bchem.com

a2bchem.com

155 ms

a2bchem.com

a2bchem.com

270 ms

www.a2bchem.com

www.a2bchem.com

384 ms

style.css

style.css

69 ms

layui.css

layui.css

142 ms

layer.css

layer.css

206 ms

jquery.min.js

jquery.min.js

272 ms

layer.js

layer.js

208 ms

vue.min.js

vue.min.js

289 ms

big.min.js

big.min.js

208 ms

common.js

common.js

210 ms

layui.js

layui.js

268 ms

js

js

90 ms

layer.css

layer.css

67 ms

logo.png

logo.png

74 ms

car.png

car.png

75 ms

48.png

48.png

72 ms

18.png

18.png

73 ms

303.png

303.png

76 ms

1540.png

1540.png

74 ms

1653.png

1653.png

158 ms

1732.png

1732.png

159 ms

1738.png

1738.png

159 ms

2200.png

2200.png

159 ms

2435.png

2435.png

160 ms

15.png

15.png

159 ms

logo-bottom.png

logo-bottom.png

193 ms

dingwei.png

dingwei.png

194 ms

email.png

email.png

194 ms

gift-banner.jpg

gift-banner.jpg

285 ms

banner.jpg

banner.jpg

411 ms

top_bg.png

top_bg.png

156 ms

robotocondensed-bold.woff

robotocondensed-bold.woff

338 ms

robotocondensed-regular.woff

robotocondensed-regular.woff

277 ms

carousel.js

carousel.js

196 ms

iconfont.woff

iconfont.woff

192 ms

roboto-regular.woff

roboto-regular.woff

379 ms

Accessibility Review

a2bchem.com accessibility score

84

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

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

High

Form elements do not have associated labels

Best Practices

a2bchem.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

a2bchem.com SEO score

88

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise A2bchem.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 A2bchem.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.

Social Sharing Optimization

a2bchem.com

Open Graph description is not detected on the main page of A2B Chem. 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: