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

BROMOPYROGALLOL RED

Synonyms:				None

CAS No:				16574-43-9

Chemical Formula:			C19H10Br2O9S

Formula Weight:			574.15

Appearance:				Green to Brown to Black Powder

Infrared Spectrum:			Conforms to Structure and Standard

Assay (Titration):			~70% 
(with silver nitrate after O2 Combustion)

UV-Visible Spectrum:		0.01 G/L, H2O
					E(553 +/- 8)NM= 22,000 (minimum)
					E(281 +/- 5)NM= 25,000 (minimum)
					or
					50% Ethanol
					E(580 +/- 8)NM = 17,000 (minimum)

Solubility:				Opaque, purple solution
(1 mg/ml 1M NH4OH)

Effective Date: 02/16/10