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

METHYLENE GREEN
ZINC CHLORIDE DOUBLE SALT

Synonyms:				Basic Green 5
C.I. 52020

CAS No.:				224967-52-6

Chemical Formula:			C16H17CIN4O2S

Formula Weight:			433.0

Appearance:				Very dark green or brown powder

Identification (IR):			To conform to structure 

Specific extinction: 			930 λ 650 -662 nm in water
E (1%/1cm)				(E – 45000 minimum)	
					825 λ 610 – 620 nm in water
					(E – 30000 minimum)
	
Loss on Drying:			10% maximum

Solubility:				Opaque, deep blue solution
 (1 mg/ml, H2O)

Effective Date: 02/06/19