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

PRIMULINE   C.I. 49000

Synonyms:				C.I. 49000; Direct Yellow 59; 
					Primuline Yellow; Thioflavine S
				
CAS No:				8064-60-6

Chemical Formula:			C21H14N3O3S3Na

Formula Weight:			475.53

Description:				Yellow to yellow-gold to orange to
					light brown powder and/or crystals

Identification:			Conforms to structure and standard

Assay:					50 % minimum

Melting Point:			> 300 Deg. C

U.V. Absorption (in H2O):	Lambda max. 345 - 355 nm

Solubility:				Clear to very slightly hazy yellow
(1 mg/ml in Methanol)		to yellow-green solution

Effective: 12/29/08