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About product and suppliers:
        Alibaba.com offers 13,087 grey calcium products. About 4% of these are other metals & metal products, 2% are carbonate, and 1% are feed grade minerals & trace elements. 

A wide variety of grey calcium options are available to you, such as organic fertilizer, chloride, and other fertilizers. You can also choose from industrial grade, agriculture grade, and food grade. As well as from free samples, paid samples. 

There are 13,087 grey calcium suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of grey calcium respectively. 

Grey calcium products are most popular in Southeast Asia, South America, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 4,208 with ISO9001, 1,286 with ISO14001, and 1,259 with Other certification.