4-PHENYLAZO-1-NAPHTHYLAMINE Property

Melting point:

124°C

Boiling point:

380.33°C (rough estimate)

Density 

1.1633 (rough estimate)

refractive index 

1.6470 (estimate)

solubility 

Solubility Virtually insoluble in water; slightly soluble in ethanol; soluble in acetone, benzene,ethyl acetate, toluene, xylene

Colour Index 

11350

pka

2.70(at 25℃)

form 

crystals

color 

Dark red

PH Range

Red (3.7) to yellow (5.0)

λmax

439nm

Major Application

Display device, semiconductor, sensors, photosensitive materials, recording materials, fooding materials, imaging materials, inks, engraving coatings, lubricants, hair dyes, food storage, dental materials

CAS DataBase Reference

131-22-6(CAS DataBase Reference)

EPA Substance Registry System

1-Naphthalenamine, 4-(phenylazo)- (131-22-6)

Safety

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

3

RTECS 

QJ0360000

HS Code 

2927.00.5000

Toxicity

mma-sat 500 mg/plate AEMIDF 42,641,81

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

4-PHENYLAZO-1-NAPHTHYLAMINE Chemical Properties,Usage,Production

Preparation

aniline diazotization, and Naphthalen-1-amine coupling.

Safety Profile

Mutation data reported. When heated to decomposition it emits toxic vapors of NOx.

Purification Methods

Crystallise the dye from cyclohexane or aqueous EtOH. [Brode et al. J Am Chem Soc 74 4641 1952, Beilstein 16 H 361, 16 III 406, 16 IV 546.]

Properties and Applications

brilliant red light yellow to brilliant yellow orange (mineral oil). Red acicular crystal, melting point 123 ℃. Soluble in alcohol and benzene. In concentrated sulfuric acid for magenta; After dilution for red light brown, precipitation, At 2% hot hydrochloric acid solution for magenta solution, there are residues. Dye alcohol solution to join concentrated sodium hydroxide solution for yellow brown. Used for oil, paraffin wax, paint color.