Chemical name: Calcium carbonate

Molecular formula: CaCO₃

White powder, non-toxic, light weight, stable in air, slightly hygroscopic. Uses: Precipitated calcium carbonate is the most widely used inorganic pigment, widely used in rubber, paper, plastics, adhesives, coatings, inks, daily necessities, cosmetics and feed.

Packing: Composite plastic woven bag, 25KG/bag
 

Index Item		HG/T 2226-2010
		Rubber and plastics		Coating		Papermaking
		Top grade	First grade	Top grade	First grade	Top grade	First grade
CaCO3 % ≥		98	97	98	97	98	97
PH Value >		9-10	9-10.5	9-10	9-10.5	9-10	9-10.5
Volatile content at 105°C % ≤		0.4	0.5	0.4	0.6	1.0
Content of insoluble substances in hydrochloric acid % ≤		0.1	0.2	0.1	0.2	0.1	0.2
Sedimentation volume ml/g ≥		2.8	2.4	2.8	2.6	2.8	2.6
Iron (F) % ≤		0.05	0.08	0.05	0.08	0.05	0.08
(Mn)% ≤		0.005	0.008	0.006	0.008	0.006	0.008
Residue on sieve	125μm test sieve % ≤	All Pass	0.005	All Pass	0.005	All Pass	0.005
	45μm test sieve % ≤	0.2	0.4	0.2	0.4	0.2	0.4
Whiteness ≥		94	92	95	93	94	92
Oil absorption value (g/100) ≤		80	100	--	--	--	--
Black dot ≤		5

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