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

CURCUMIN

Synonyms:					Natural Yellow 3;  C.I. 75300;	
						(E,E)-1,7-bis(4-Hydroxy-3-methoxyphenyl)-
						1,6-heptadiene-3,5-dione;  Diferuloylmethane.
			
CAS No:					458-37-7

Chemical Formula:				C21H20O6

Formula Weight:				368.39

Description:					Yellow to orange powder tasteless powder

Identification:				Conforms to structure and standard

Loss on drying @ 105˚C:			5.0% maximum

Assay (on dried basis):			95% minimum

Solubility (10 mg/ml in ethanol):		Clear to hazy yellow to orange solution
						
Melting Point:				183 Deg. C

UV-Vis Spectrum:				Maximum absorbance at approx. 430nm

Visual Transition Interval	:		From pH   7.4 (yellow) to pH 8.6 (red)
From pH 10.2 (red) to pH 11.8 (orange)

Effective:01/26/09