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

PHENOL RED SODIUM SALT ACS

Synonyms:					Phenolsulfonephthalein Sodium

CAS No:					34487-61-1

Chemical Formula:				C19H13NaO5S

Formula Weight:				376.36

Description:					Dark-red to brownish-red powder

Identification (IR):				To pass test

Assay: (UV vis)				>90%

Loss on drying:				< 5%

Clarity of solution:				To pass Test

Lambda Max:				423 nm in Methanol

Melting Point:				285 deg. C

Visual transition Interval			From pH 6.8 (yellow)
						to pH 8.2 (red)

Effective: 01/01/15