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About product and suppliers:
        Alibaba.com offers 2,936 magnesium sulphate heptahydrate products. About 98% of these are sulphate, 1% are borate. 

A wide variety of magnesium sulphate heptahydrate options are available to you, such as agriculture grade, industrial grade, and food grade. You can also choose from free samples, paid samples. 

There are 2,898 magnesium sulphate heptahydrate suppliers, mainly located in Asia. The top supplying countries are China (Mainland), India, and Ukraine, which supply 97%, 1%, and 1% of magnesium sulphate heptahydrate respectively. 

Magnesium sulphate heptahydrate products are most popular in South Asia, Southeast Asia, and Eastern Asia. 

You can ensure product safety by selecting from certified suppliers, including 860 with ISO9001, 437 with Other, and 219 with ISO14001 certification.