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

METHYL GREEN C.I. 42585

Synonyms:				Benzenaminium, 4-4-(dimethylamino)phenyl 4-
					(dimethylamino)-2,5 cyclohexadien-1
					-ylidenemethyl-n-ethyl-n,n-dimethyl-,bromide
					chloride

Chemical Formula:				(C27H35Cl2N3)n*xZnCl2 

Formula Weight:				516.95 

CAS No.:					14855-76-6

Appearance:					Dark green to Bronze powder

Loss on drying:				Maximum 10%

Assay:						Minimum 75%

Lambda max.:				632nm (in water)

Solubility:					Soluble in water, slightly soluble
in alcohol, practically insoluble in
methylene chloride and ether.		

Zinc content					Minimum 5%
(calculated on dried basis)	:		Maximum 7.5%

Color of solution at
 pH 2.5 to pH 10:				Blue-green solution

Effective Date: 01/09/09