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

METHYL RED SODIUM SALT ACS

Synonyms:				2-[4-(Dimethylamino)phenylazo]benzoic acid
					sodium salt; C.I. 13020; Acid Red 2

CAS No:					845-10-3

Chemical Formula:				C15H14N3O2Na

Formula Weight:				291.29

Description:					Dark Red to brownish yellow to brown powder

Melting Point:				179-182° C

Clarity of alcohol Solution:		To Pass test

Clarity of aqueous Solution:		To Pass Test

Visual Transition Interval:		From pH 4.2 (pink) 
To     pH 6.2 (yellow)

Loss on drying @110°C /1hr:		< 5%

Effective: 01/09/09