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

N-PROPYL RED

Synonyms:			2-4(Dipropylamine)phenylazo-Benzoic Acid

CAS No.:				2641-01-2

Chemical Formula:			C19H23N3O2

Formula Weight:			325.41

Description:				Reddish crystalline powder

Identification (IR):			Conforms to standard

Assay (HPLC):			98% minimum
         
Melting Point:			173.5 °C to 175 °C

Visual Transition Interval:	From pH 4.6 (red)
To     pH 6.6 (yellow)

Clarity of Solution:			Clear, red solution
(0.1 g/100 ml - Ethanol)  

Effective Date: 12/29/16