4-Amino-3-hydroxy-1-naphthalenesulfonic acid

Product name：1-amino-2-naphthol-4-sulfonic acid

Molecular formula：C₁₀H₈NO₄S

Molecular weight：238.2404

Structural formula：

Chemical Abstracts： 4-Amino-3-hydroxy-1-naphthalenesulfonic acid

CAS number：[116-63-2]

Nature :The finished product is light purple gray paste, Insoluble in cold water, ethanol, ethyl ether, Soluble in hot water. Product would be oxidized in the air,then the Appearance into a red rose with the nature of the aromatic sulfonic acid and aromatic amine.

Purpose：Used for making acid mordant dyes and acid complexing dye

Quality index
Appearance：Gray paste
Content：≥35% 
Swimming ion：≤6%