1-(4-NITROPHENYLAZO)-2-NAPHTHOL Chemical Properties

Melting point:

248-252 °C

Boiling point:

435.13°C (rough estimate)

Density 

1.2211 (rough estimate)

refractive index 

1.6500 (estimate)

storage temp. 

Sealed in dry,Room Temperature

solubility 

DMSO (Slightly, Heated)

pka

13.45±0.50(Predicted)

Colour Index 

12070

color 

Red

BRN 

680469

Stability:

Stable. Incompatible with strong oxidizing agents.

CAS DataBase Reference

6410-10-2(CAS DataBase Reference)

EPA Substance Registry System

C.I. Pigment Red 1 (6410-10-2)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

24/25-36-26-36/37/39

WGK Germany 

3

RTECS 

QL4510000

TSCA 

Yes

HS Code 

29270000

MSDS

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1-(4-NITROPHENYLAZO)-2-NAPHTHOL Usage And Synthesis

Chemical Properties

solid

Uses

Para Red is used as a fat soluble chemical dye and food additive. It is a banned colorant and a number of analytical techniques have been developed to detect it in food.

Purification Methods

Crystallise this dye from AcOH or xylene and dry it in vacuo. It has max at 488nm. [Beilstein 16 II 70.]

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