CALCIUM CARBONATE
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Identification
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Chemical Name
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Calcium carbonate
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Synonyms
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Carbonic acid calcium salt; Limestone; Marble
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Molecular Formula
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CaCO3
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Molecular Weight
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100.09
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CAS Registry Number
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471-34-1
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EINECS
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207-439-9
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General Specification
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Assay,%
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99.9 min
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Clarity test
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Approved
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Insoluble matter in hydrochloric acid, %
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0.01 max
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Alkalinity, mmol/100g
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0.25 max
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Chloride (Cl), %
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0.002 max
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Sulfate (SO4), %
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0.01 max
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Sodium (Na), %
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0.1 max
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Magnesium (Mg), %
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0.05 max
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Ferric (Fe), %
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0.001 max
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Heavy metal (As Pb), %
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0.002 max
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Packing
l 25kg bags
Application
l Food additives: As enhancer in chewing gum, chocolate
l Light Industry: As friction modifiers of toothpaste
l Paper: increase whiteness, coated paper additives
l Electronics Industry: Inhibit BaTiO3 grains grew excessive, lower voltage; oxide cathode coating material in vacuum electronic devices.