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

ETHYL ORANGE SODIUM SALT

Synonyms:					4-(4-Diethylaminophenylazo)benzene-
sulfonic acid, sodium salt		

CAS No:					62758-12-7

Chemical Formula:				C16H18N3NaO3S

Formula Weight:				355.39

Description:					Orange Powder

Assay:						90% Minimum

Loss on drying (110°C/1hr):		5% Maximum

Absortivity 1%/1cm in			825 Minimum
H2O at Lambda max. 475nm

Visual Transition Interval:		From pH 3.4 (rose-red) 
To     pH 4.8 (yellow)

Solubility 0.1% (water):			Clear orange solution

Effective: 12/01/14