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

1-AMINO-2-NAPHTHOL-4-SULFONIC ACID ACS

Synonyms:					4-Amino-3-hydroxy-1-naphthalene
						Sulfonic Acid

CAS No:					116-63-2

Formula:					H2N(HO)C10H5SO3H

F.W.:						239.25

Appearance:					White to slightly 
						brownish-pink to light purple powder

Assay:						> 90.0%

Solubility in sodium carbonate:		To Pass Test

Residue after ignition:			0.1 % maximum

Sulfate  (SO4)				0.2 % maximum

Sensitivity to phosphate:			To Pass Test

Effective: 01/01/14