Chemsrc.com Site Title
CAS号查询-CAS NO查询-MSDS查询 「化源网」 专业化工搜索引擎
Chemsrc.com Meta Description
化源网提供快速CAS号查询，CAS No查询，MSDS查询，数百万化合物的专业数据，包括物化, MSDS, 安全信息, 合成路线及文献, 毒性，上下游，期刊文献等。
Chemsrc.com Test Results
chemsrc.com Mobile Usability: 97/100
Quick overview:
Size 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
<a href="/salerIndex/1.html">1</a> and 15 others are close to other tap targets.
chemsrc.com Mobile Speed: 78/100
Quick overview:
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 7 blocking script resources and 4 blocking CSS resources. This causes a delay in rendering your page.
None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.
http://www.chemsrc.com/js/jquery.js
...
Optimize CSS Delivery of the following:
http://www.chemsrc.com/bootstrap/css/bootstrap.min.css
...
Leverage 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://js.passport.qihucdn.com/11.0.1.js?858a780b2b922d775e3339f9ce6d519b (10 minutes)
...
Minify 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 1.4KiB (24% reduction).
Minifying http://www.chemsrc.com/js/common.js?v=201607311 could save 1.4KiB (24% reduction) after compression.
Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 1.8KiB (20% reduction).
Minifying http://www.chemsrc.com/ could save 1.8KiB (20% reduction) after compression.
Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 535B (43% reduction).
Losslessly compressing http://www.chemsrc.com/img/minilogo.png could save 535B (43% reduction).
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