5-Amino-1-naphthol Chemical Properties

Melting point:

190 °C (dec.) (lit.)

Boiling point:

284.68°C (rough estimate)

Density 

1.1202 (rough estimate)

refractive index 

1.6070 (estimate)

storage temp. 

-20°C Freezer

solubility 

DMSO (Slightly), Methanol (Slightly)

pka

3.97(at 25℃)

form 

Solid

color 

Light Purple to Purple

CAS DataBase Reference

83-55-6(CAS DataBase Reference)

NIST Chemistry Reference

5-Amino-1-naphthol(83-55-6)

EPA Substance Registry System

1-Naphthalenol, 5-amino- (83-55-6)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-37/39

WGK Germany 

3

HS Code 

29222990

MSDS

• Language:English Provider:5-Amino-1-naphthol
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5-Amino-1-naphthol Usage And Synthesis

Chemical Properties

pale purple to brown-purple crystalline powder

Uses

5-Amino-1-naphthol is used as a coupling component for azo dyes (coupling takes place ortho to the amino or hydroxyl group, or para to the hydroxyl group depending on the pH), and as an intermediate for sulfur dyes.

Preparation

1-Aminonaphthalene-5-sulfonic acid paste (Section 6.2) is added to molten sodium hydroxide at 200°C, and the reaction is completed by heating slowly to 250°C and maintaining this temperature for 3 h. After dilution and careful neutralization with hydrochloric acid, 5-amino-1-naphthol precipitates in 85 % yield (mp 192°C).

5-Amino-1-naphthol(83-55-6)Related Product Information

• ALPHA-NAPHTHOLBENZEIN
• Tris(hydroxymethyl)aminomethane
• 2-Naphthol
• Phenmedipham
• Glycine
• Terbinafine hydrochloride
• 1,1'-Bi-2-naphthol
• ALTRENOGEST
• 1-Naphthol
• Terbinafine Hydrochloride
• 1-AMINO-7-NAPHTHOL
• Aristolochic acid
• aristolactam I
• 5-Amino-1-hydroxy-2-naphthalenesulfonic acid
• Aristolochic acid B
• 5-AMINO-1-NAPHTHOL-3-SULFONIC ACID HYDRATE,5-AMINO-1-NAPHTHOL-3-SULFONIC ACID 97+%,1-AMINO-5-NAPHTHOL-7-SULFONIC ACID
• 6-Amino-1-naphthol-3-sulfonic acid, I-Acid,6-Amino-1-naphthol-3-sulfonic Acid Hydrate
• 2-AMINO-2-NAPHTHOL