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

PHENOLPHTHALEIN WHITE ACS

Synonyms:					3,3-bis(p-hydroxyphenyl)phthalide; 3,3-bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone

CAS No:					77-09-8

Chemical Formula:				C20H14O4

Formula Weight:				318.33

Description:					White to off-white crystalline powder

Identification A,B:				To pass tests

Melting Point:				258-263 Deg. C

Clarity of alcohol solution:		To Pass Test

Visual transition Interval:			pH 8.0 (colorless) to pH 10.0 (red)

Assay:						97.0-101.0%

Loss on drying:				1.0 % maximum

Residue on Ignition:			0.1 % maximum

Arsenic (As):					8 ppm maximum

Heavy metals (as Pb):			0.0015% maximum

Organic Volatile Impurities:		To Pass Test

Chromatographic Impurity:		<1.0%

Fluoran:					To Pass Test

Effective: 12/30/08