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About product and suppliers:
        Alibaba.com offers 9,114 sigma chemicals products. About 12% of these are mixing equipment, 11% are pharmaceutical intermediates, and 8% are antibiotic and antimicrobial agents. A wide variety of sigma chemicals options are available to you, such as free samples, paid samples. There are 9,085 sigma chemicals suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Pakistan, which supply 99%, 1%, and 1% of sigma chemicals respectively. Sigma chemicals products are most popular in North America, Western Europe, and Mid East. You can ensure product safety by selecting from certified suppliers, including 468 with ISO9001, 78 with Other, and 6 with ISO14001 certification.
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