5-AMINO-1-NAPHTHOL-3-SULFONIC ACID Chemical Properties

Density 

1.627±0.06 g/cm3(Predicted)

pka

-0.35±0.40(Predicted)

form 

powder to crystal

color 

White to Amber to Dark purple

CAS DataBase Reference

489-78-1(CAS DataBase Reference)

Safety Information

Risk Statements 

36/37/38

Safety Statements 

26-36/37/39

HS Code 

2930909899

5-AMINO-1-NAPHTHOL-3-SULFONIC ACID Usage And Synthesis

Chemical Properties

1-Amino-5-hydroxynaphthalene-7-sulfonic acid [489-78-1].  (8-amino-4-hydroxynaphthalene-2-sulfonic acid), M acid, C10H9NO4S, Mr 239.2, and its sodium salt are sparingly soluble in water. Coupling with diazo compounds takes place under acidic and alkaline conditions, but a bisazo derivative cannot be obtained. Reaction with bisulfite gives 4,8-dihydroxynaphthalene-2-sulfonic acid.

Production Methods

1-Aminonaphthalene-5,7-disulfonic acid is heated with concentrated sodium hydroxide for 16 h at 172 – 176℃. After the reaction mixture is quenched, acidified, and purged of sulfur dioxide, the product is isolated in 80 % yield.

5-AMINO-1-NAPHTHOL-3-SULFONIC ACID(489-78-1)Related Product Information

• 2-amino-1-naphthol-4-sulfonic acid,4-AMINO-3-NAPHTHOL-1-SULFONIC ACID
• 7-(Acetylamino)-4-hydroxy-2-naphthalenesulfonic acid
• 1-amino-2-naphthol-4-sulfonic acid monosodium salt
• N-3-SULFOPHENYL-7-AMINO-1-NAPHTHOL-3-SULFONIC ACID
• 4-Hydroxy-7-methylamino-2-naphthalenesulfonic acid
• 6-Amino-1-naphthol-3-sulfonic Acid Hydrate,6-Amino-1-naphthol-3-sulfonic acid, I-Acid,6-AMINO-1-NAPHTHOL-3-SULFONIC ACID,2-AMINO-5-NAPHTHOL-7-SULFONIC ACID
• 8-Amino-1-naphthol-5-sulfonic acid, tech., 96%,8-AMINO-1-NAPHTHOL-5-SULFONIC ACID,4-AMINO-5-NAPHTHOL-1-SULFONIC ACID,1-AMINO-8-NAPHTHOL-4-SULFONIC ACID
• 5-AMINO-1-NAPHTHOL-3-SULFONIC ACID
• 2-AMINO-8-NAPHTHOL-6-SULFONIC ACID,6-AMINO-4-NAPHTHOL-2-SULFONIC ACID,7-AMINO-1-NAPHTHOL-3-SULFONIC ACID
• N-PHENYL-2-AMINO-8-NAPHTHOL-6-SULFONIC ACID,N-Phenyl-7-amino-1-naphthol-3-sulfonic acid
• N-Phenyl-γ-acid
• 1-Amino-2-naphthol-4-sulfonic acid
• 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
• 1-Naphthol
• 5-Amino-1-naphthol
• 6-chloro-1-amino-2-naphthol-4-sulfonic acid
• 7-[N-methyl-N-(3-carboxy-4-hydroxyphenylfonyl)]amino-1-naphthol-3-sulfonic acid
• N-acetyl-(1-amino-2-naphthol-6-sulfonic acid)