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Name:Zinc carbonate

Molecular Formula:ZnCO3

Molecular Weight:125.42

CAS Registry Number:3486-35-9


Smithsonite, or zinc spar, is zinc carbonate ZnCO3, a mineral ore of zinc. Historically, smithsonite was identified with hemimorphite before it was realised that they were two distinct minerals. The two minerals are very similar in appearance and the term calamine has been used for both, leading to some confusion. The distinct mineral Smithsonite was first described in 1832 and named for British chemist and mineralogist, James Smithson (1754-1829), whose estate financed the Smithsonian Institution Zinc carbonate is used as an astringent and excipient in shampoo. It is also used as a fireproofing filler for rubber and plastics, as a feed additive, as a pigment, in cosmetics and lotions, and in the manufacturing of porcelain, pottery, and rubber
Item                                           Index
Excellent product First grade product Qualified product
Fire content % 25.0-28.0 25.0-30.0 25.0-32.0
Moisture, % ≤ 2.5 3.5 5.0
Fineness(passing 75um screen), % ≥ 95.0 94.0 93.0

Packing:Packed with inner polyethylene film bag and outer plastic weaving bag. Net weight per bag is 25kg.



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