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

NEW METHYLENE BLUE N
ZINC CHLORIDE DOUBLE SALT

Synonyms:				C.I. 52030; Basic Blue 24

CAS No:				6586-05-6

Formula:				C18H22CIN3S* 1/2ZnCl2  

F.W.:					416.05

Appearance:				Dark-brown to deep purple powder

Identification:			Conforms to structure

Assay:					90.0 % Minimum

Loss on drying:			5% Maximum

Spectrophotometric Assay:	632.0nm +/- 3nm = 0.529
(5.0mgs/ ltrs. In water)		591.0nm +/- 3nm =0.433
					287.0nm +/- 3nm = 0.336
					245.0nm +/- 3nm = 0.206
Extinction Co-efficient:
E (632.0nm +/- 3nm			44000 Min.
E (591.0nm +/- 3nm			36000 Min.
E (287.0nm +/ -3nm			28000 Min.
E (245.0nm +/-3nm			16000 Min.

Loss on Drying:			5% Maximum

Effective: 08/01/19