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About product and suppliers:
        Alibaba.com offers 133 1 3 propanediamine products. such as free samples. 

There are 133 1 3 propanediamine suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of 1 3 propanediamine respectively. 

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

You can ensure product safety by selecting from certified suppliers, including 11 with ISO9001, 4 with Other certification.
        
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