Purity ( counted as CaCO3)        

≥ 98.0

Acid Insoluble Matter            

≤ 0.20

Magnesium and Alkali Salts

≤ 1.0

Heavy Metals               

≤ 0.002

Barium                    

Does not impart a green dolor

Arsenic                   

≤ 0.0003

Loss on Drying               

≤ 2.0

Iron                      

≤ 0.10

Lead                                 

≤ 0.0003

Mercury               

≤ 0.00005

Organic Volatile Impurities

Meets the requirements

Tapped Density

0.90-1.25gm/ml