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

ERIOCHROME CYANINE R
(C. I. 43820)

Synonyms:					Mordant Blue 3; Chromoxane Cyanine R;
						Solochrome Cyanine R

CAS No:					3564-18-9

Chemical Formula:				C23H15 Na3O9S

Formula Weight:				536.40

Lambda Max:				435 nm  in pH 7 aqueous buffer
						512 nm  in methanol

Dye content:					~ 50%

Visual transition Interval:			From pH 1.0  (yellow-orange) 
						To      pH 2.0  (red)
						From pH 6.0  (red)
						To      pH 7.0 (yellow)
						From pH 11.0  (yellow)
						To      pH 12.0  (blue)

Solubility:					5% in water
						2% in ethanol

Effective: 01/16/09