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About product and suppliers:
        Alibaba.com offers 393,843 cas products. About 36% of these are pharmaceutical intermediates, 27% are syntheses material intermediates, and 12% are agrochemical intermediates. 

A wide variety of cas options are available to you, such as free samples, paid samples. 

There are 392,539 cas suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Taiwan, which supply 99%, 1%, and 1% of cas respectively. 

Cas products are most popular in North America, Western Europe, and Southeast Asia. 

You can ensure product safety by selecting from certified suppliers, including 62,476 with ISO9001, 24,345 with Other, and 4,941 with ISO14001 certification.