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About product and suppliers:
        Alibaba.com offers 14,544 grey calcium products. About 6% 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 calcium carbonate, feed grade minerals & trace elements, and calcium nitrate. You can also choose from industrial grade, medicine grade, and agriculture grade. As well as from carbonate, calcium organic salt, and nitrogen fertilizer. And whether grey calcium is free samples, or paid samples. 

There are 14,544 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, Domestic Market, and South America. 

You can ensure product safety by selecting from certified suppliers, including 4,315 with ISO9001, 1,566 with Other, and 1,191 with ISO14001 certification.