4-Nitrosophenol Chemical Properties

Melting point:

132-144°C

Boiling point:

229.19°C (rough estimate)

Density 

1.3147 (rough estimate)

vapor pressure 

0.003Pa at 20℃

refractive index 

1.5423 (estimate)

solubility 

soluble in Methanol

form 

powder to crystal

pka

pK1:6.48 (25°C)

color 

Pale-yellow, orthorhombic needles

Water Solubility 

<0.1 g/100 mL at 21 ºC

Merck 

14,6642

Stability:

Stability Flammable. Incompatible with strong oxidizing agents. Explodes when heated, or in contact with acids or alkalies.

LogP

1.1 at 20℃

CAS DataBase Reference

104-91-6(CAS DataBase Reference)

NIST Chemistry Reference

Phenol, 4-nitroso-(104-91-6)

EPA Substance Registry System

p-Nitrosophenol (104-91-6)

Safety Information

Hazard Codes 

Xn,N

Risk Statements 

21/22-40-41-68-51/53-22

Safety Statements 

15-24/25-26-61-49-47-36/37/39

RIDADR 

3236

RTECS 

SM4725000

HazardClass 

4.1

PackingGroup 

II

HS Code 

2908990000

Hazardous Substances Data

104-91-6(Hazardous Substances Data)

Toxicity

mmo-sat 50 mg/plate FCTXAV 18,523,80

MSDS

• Language:English Provider:4-Nitrosophenol

4-Nitrosophenol Usage And Synthesis

Chemical Properties

black solid

Uses

Dyes.

Hazard

Dangerous fire and explosion risk, reacts violently with acids and alkalies, may explode spontaneously, intraplant transport must be in tightly covered steel barrels.

Safety Profile

Poison by parented and intraperitoneal routes. Mutation data reported. An irritant and sensitizer. Many nitroso compounds are carcinogens. A very dangerous fire and explosion hazard. When exposed to heat or flame, it burns explosively. Contamination by acid or alkali may cause ignition . Can heat spontaneously and cause fire. When heated to decomposition it emits toxic fumes of NOx. See also NITROSO COMPOUNDS.

Purification Methods

4-Nitrosophenol forms yellow crystals from xylene, *C6H6 (m ~144o) or Et2O (m 128-129o, dec). [Beilstein 7 H 622, 7 II 574, 7 III 3367.]

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