2-NITROSO-1-NAPHTHOL-4-SULFONIC ACID Chemical Properties

Melting point:

140-145 °C (dec.)

Density 

1.65±0.1 g/cm3(Predicted)

pka

0.11±0.40(Predicted)

form 

powder to crystal

color 

Orange to Brown

CAS DataBase Reference

3682-32-4(CAS DataBase Reference)

EPA Substance Registry System

1-Naphthalenesulfonic acid, 4-hydroxy-3-nitroso- (3682-32-4)

Safety Information

Hazard Codes 

Xn,Xi

Risk Statements 

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

Safety Statements 

36/37-37/39-26

WGK Germany 

3

HS Code 

2908.99.9000

MSDS

• Language:English Provider:SigmaAldrich

2-NITROSO-1-NAPHTHOL-4-SULFONIC ACID Usage And Synthesis

Purification Methods

Crystallise the acid from dilute HCl solution. The crystals are dried over CaCl2 in a vacuum desiccator. It has also been purified by dissolution in aqueous alkali and precipitation by addition of water. It is a reagent for cobalt. [Beilstein 11 H 331, 11 II 189, 11 III 621, 11 IV 668.]

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