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About product and suppliers:
        Alibaba.com offers 271 penten products. About 25% of these are waterproof membrane, 22% are pharmaceutical intermediates, and 16% are other waterproofing materials. 

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

There are 248 penten suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Malaysia, and Indonesia, which supply 87%, 7%, and 3% of penten respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 39 with ISO9001, 32 with Other, and 10 with ISO14001 certification.