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

METHYL ORANGE ACS

Synonyms:					C.I. 13025; Acid Orange 52;
Orange III; 4-(Dimethylamino)azo-
benzenesulfonic Acid, Sodium Salt						
CAS No:					547-58-0

Chemical Formula:				C14H14N3NaO3S

Formula Weight:				327.34

Description:					Light to Dark Orange powder

Clarity of Solution:				To Pass ACS Test

Aqueous solubility:			Soluble in 500 parts water;
						More soluble in hot water

Melting Point:				> 300 deg. C

Loss on drying @110 °C/1hr:		< 3%

Visual Transition Interval:		pH 3.2 (pink to light red ) to pH 4.4 (yellow)

Effective: 01/09/17