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

ROSOLIC ACID

Synonyms:					C.I. 43800

CAS No:					603-45-2

Formula:					C19H14O3

F.W.:						290.32

Appearance:					Red to reddish-brown powder

Lambda max:				482 nm
(In Ethanol + 2ml 1N Hydrochloric Acid)

Visual Transition Interval:		From pH 6.6 (yellow) 
To     pH 8.0 (pink)

Loss on drying:				< 3.0%
(110 Deg. C/1 hour)

Solubility:					Soluble in ethanol (golden yellow),
moderately soluble in glacial acetic
acid and slightly soluble in water, ether
and chloroform.

Solubility   (in ethanol 96%):		Clear orange solution

Effective: 12/23/08