1,3-DIHYDROXYNAPHTHALENE Chemical Properties

Melting point:

123-125 °C(lit.)

Boiling point:

246.06°C (rough estimate)

Density 

1.0924 (rough estimate)

refractive index 

1.5418 (estimate)

storage temp. 

Keep in dark place,Inert atmosphere,Room temperature

solubility 

ethanol: soluble50mg/mL

form 

crystalline

pka

9.15±0.40(Predicted)

color 

white to tan

Water Solubility 

Soluble in ethanol (50 mg/ml), and water.

Sensitive 

Light Sensitive

Merck 

14,6396

BRN 

2044002

CAS DataBase Reference

132-86-5(CAS DataBase Reference)

EPA Substance Registry System

1,3-Naphthalenediol (132-86-5)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38-22

Safety Statements 

26-37/39

WGK Germany 

3

RTECS 

QJ4725000

F 

8-9-23

TSCA 

Yes

HS Code 

29029090

Toxicity

mouse,LD50,intraperitoneal,200mg/kg (200mg/kg),National Technical Information Service. Vol. AD691-490,

MSDS

• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

1,3-DIHYDROXYNAPHTHALENE Usage And Synthesis

Chemical Properties

orange-pink to brown crystalline powder. 1,3-Naphthalenediol [132-86-5], naphthoresorcinol, mp 124℃, is synthesized by hydrolysis of 1,3-naphthalenediamine with sulfuric acid; by heating 1-amino-3-hydroxy-naphthalene-4-sulfonic acid with acid; or by cyclization of ethyl phenylacetoacetate. It is used as an analytical reagent for sugars and glucuronic acid in urine. It is oxidized in alkaline solution to 2-hydroxy-1,4-naphthoquinone and reacts with ammonia at 140℃ to give 3-amino-1- naphthol and 1,3-naphthalenediamine.

Uses

Reagent for sugars, oils, and for glucuronic acid in urine: Forsyth, Nature 161, 239 (1948); Heyns, Kelch, Z. Anal. Chem. 139, 339 (1953).

Uses

1,3-Naphthalenediol is a derivative of naphthalene (N345600) and may have antibacterial activity against oral bacteria.Dyes and metabolites.

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