1-Nitroso-2-naphthol Chemical Properties

Melting point:

106-108 °C (dec.) (lit.)

Boiling point:

303.81°C (rough estimate)

Density 

1.2427 (rough estimate)

refractive index 

1.5200 (estimate)

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

Colour Index 

10005

pka

7.87±0.10(Predicted)

form 

crystalline

color 

tan to brown

Water Solubility 

insoluble

Merck 

14,6641

BRN 

776947

CAS DataBase Reference

131-91-9(CAS DataBase Reference)

NIST Chemistry Reference

2-Naphthalenol, 1-nitroso-(131-91-9)

EPA Substance Registry System

2-Naphthalenol, 1-nitroso- (131-91-9)

Safety Information

Hazard Codes 

Xn

Risk Statements 

22-36/37/38-33-20/21/22

Safety Statements 

26-36-45

RIDADR 

UN3077

WGK Germany 

3

RTECS 

QL4725000

F 

8

TSCA 

Yes

HazardClass 

9

PackingGroup 

III

HS Code 

29089000

Toxicity

LDLo orl-rat: 500 mg/kg NCNSA6 5,35,53

MSDS

• Language:English Provider:1-Nitroso-2-naphthol
• Language:English Provider:SigmaAldrich
• Language:English Provider:ACROS
• Language:English Provider:ALFA

1-Nitroso-2-naphthol Usage And Synthesis

Chemical Properties

brown powder

Uses

Organic synthesis, prevention of gum formation in gasoline, dye intermediate, analytical reagent.

Uses

1-Nitroso-2-naphthol as a complexing agent for the on-line preconcentration of cobalt with FI-FAAS. 1-Nitroso-2-naphthol is the chelating ion-exchanger in the synthesis of alumina adsorbents that are of acidic, basic and neutral nature. It is used for the removal and preconcentration of Pb(II), Cu(II), Cr(III) from waste, as well as drinking water. It is also used in the preconcentration of cobalt using C(18) microcolumn with flow injection that is coupled to a flame atomic absorption spectrometry (FI-FAAS) system. 1-Nitroso-2-naphthol is used in the preparation of 1-nitroso-2-naphthol-sodium nitrite reagent.

Definition

ChEBI: 1-Nitroso-2-naphthol is a member of naphthols.

Safety Profile

Moderately toxic by ingestion.Many nitroso compounds are carcinogens. Ignites whenheated to 124°C. Mutation data reported. When heated todecomposition it emits toxic fumes of NOx.

Purification Methods

Crystallise the naphthol from pet ether (b 60-80o, 7.5mL/g). [Beilstein 7 H 712, 7 IV 2419.]

1-Nitroso-2-naphthol(131-91-9)Related Product Information

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