zinc carbonate zinc carboante good quality zinc carbonate zinc content 57.5% zinc carbonate use in rubber oil drilling

Zinc carbonate

 

1. Physical Properties

 

Physical & chemical property: white powder, odorless and tasteless, specific weight is 4.42-4.45, insolube in water or alcohol, slightly soluble in ammonia, soluble in diluted acid and sodium oxide.

Molecular formula : ZnCO3 . 2Zn(OH)2 . H2OMolecular weight : 324.15

Solubility: Insoluble in water.

Density: 4.4 

% Volatiles by volume @ 21C (70F): 0

Melting Point: Decomposes to zinc oxide

 

2.Uses

 

As raw materials of latex products, used to prepare calamine or as skin protect, also widely used in rubber, paints, medicines and other chemical industries.  

3.Specification

 Quality standards: PRC's Chemical industry standard HG/T2523-93

Item	Specifications
	Excellent- class	First- class	Conforming- class
Main content (in zinc)(dry basis), %≥	57.5	57	56.5
Loss on ignition%	25.0-28.0	25.0-30.0	25.0-32.0
Heavy metal content (in Pb), % ≤	0.04	0.05	0.05
Water content, % ≤	2.5	3.5	5
Sulphate content, (in SO4) % ≤	0.60	0.80	--
Fineness( 75μm sieve), % ≥	95.0	94.0	93.0
Cadmium content(Cd) , % ≤	0.10	--	--

4. Packing:

In 25kg plastic woven bag lined with polyethylene bag.

5.Photos

regards,

H.J

zinc carbonate basic 57.5%