S P E C I F I C A T I O N S

CALCIUM SULFATE DIHYDRATE ACS

Synonyms:				Gypsum; Alabaster; C.I. 77231; C.I. Pigment White
					 25; Sulfuric Acid; Calcium Salt

CAS No:				10101-41-4

Chemical Formula:			CaSO4*2H2O

Formula Weight:			172.17

Appearance:						White crystalline powder
Assay:							98.0 - 102.0%
Insoluble in dilute hydrochloric acid		0.02% maximum
Chloride (CI)					0.005% maximum
Nitrate (NO3)					Passes test
Carbonate (CO3)					Passes test
Heavy metals (as Pb)				0.002% maximum
Iron (Fe)						0.001% maximum
Magnesium (Mg)					0.02% maximum
Potassium (K)					0.005% maximum
Sodium  (Na)					0.02% maximum
Strontium  (Sr)					0.05% maximum

Effective Date 01/27/09