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

EOSIN Y, FREE ACID
C.I. 45380:2

Synonyms:			2’4’5’7’-Tetrabromofluorescein; Eosin Acid; 
Solvent Red 43; C.I. 45380:1

CAS No:				15086-94-9

Chemical Formula:			C20H8Br4O5

Formula Weight:			647.92

Appearance:				Buff to Orange Powder

Absortivity:				1463
(1%/1cm at λ 517.4nm)

Loss on drying:			1% Maximum

Water insoluble matter:		0.5% Maximum

Solubility:				Clear Bright Red solution 
(1% DI Water + Liq NH3)				

Effective: 01/01/20