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

XYLENOL ORANGE TETRASODIUM SALT ACS

Synonyms:			3,3’-bis[N,N-di(Carboxymethyl)aminomethyl]o-						cresolsulfonephthaleine, sodium salt; Xylenol orange, 					indicator; Xylenol Orange, sodium salt; Tetrasodium

CAS No:					3618-43-7

Formula:					C31H28Na5O13SN2

F.W.:						760.58

Appearance:					Dark red to dark brown crystalline powder

Loss on drying (at 110 °C/1hr):		10.0 % maximum

Clarity of solution
(0.1 g/100 ml of water):			Clear Solution

Suitability for zinc 
Titration:					To Pass Test

Absorptivity 1%/1cm, at			>550
Λ max. 576.6 nm

Effective: 01/01/16