1. Formula: CoSO4.7H2O  
2. CAS NO.: 10026-24-1
3. M. W: 281.10
4. Properties: Brown yellow or red crystal, density: 1.948g/cm3, melting point: 96.8, freely soluble in water and methanol, slightly soluble in ethanol. It rime into anhydrous compound at 420
5. Specification: (%)
Index   High-grade  First-grade  
Assay (Co)   21.0 min  20.0 min  
Iron(Fe)   0.002 max  0.005 max  
Copper(Cu) 0.002 max  0.005max  
Nickel(Ni)   0.1max  0.1max  
Zinc (Zn)   0.001max  0.005max  
Lead(Pb)   0.002 max  0.004max  
Magnesium(Mn) 0.005max  0.005max  
Cadmium(Cd) 0.002max  0.005max  
Water insoluble substance  0.02max  0.05max  
6. Application: Used as paint drier in coating industry, glaze for painted china in ceramic industry, additives for alkaline battery and lithopone in the battery industry. Also used in producing pigment containing cobalt and material for cobalt salt. Besides, it is also used in electroplating, catalyzed, additive for feedingstuff, analyzing reagent.
7. Storage: Store in a dry place. Avoid heating and damp
8. Packing: 25kg net, Paper/PE complex bags with double PE inners.