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

TRYPAN BLUE

Synonyms:			Diamine blue 3B; Niagara Blue 3B;
C.I. 23850; Direct Blue 14

	CAS No.:			72-57-1

Chemical Formula:		C34H24N6Na4O14S4  

Formula Weight:		960.82

Appearance:			Dark greenish-brown to Black powder  

Identification (IR):		Conforms to standard

Absortivity:			>800
(1%/ 1cm at λ max. 606.0nm)

Dye content:			> 80% 
         
Loss on drying:		< 10% 

Solubility:			Clear to opaque dark blue solution
 (1 mg/ml H2O) 

Effective date: 12/31/12