104-91-6

Name 4-Nitrosophenol
CAS 104-91-6
EINECS(EC#) 203-251-6
Molecular Formula C6H5NO2
MDL Number MFCD00002329
Molecular Weight 123.11
MOL File 104-91-6.mol

Chemical Properties

Appearance black solid
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
Stability: Stability Flammable. Incompatible with strong oxidizing agents. Explodes when heated, or in contact with acids or alkalies.
Water Solubility  <0.1 g/100 mL at 21 ºC
Merck  6642
LogP 1.1 at 20℃
Uses
Dyes.
CAS DataBase Reference 104-91-6(CAS DataBase Reference)
NIST Chemistry Reference Phenol, 4-nitroso-(104-91-6)
EPA Substance Registry System 104-91-6(EPA Substance)

Safety Data

Hazard Codes  Xn,N
Risk Statements 
R21/22:Harmful in contact with skin and if swallowed .
R40:Limited evidence of a carcinogenic effect.
R41:Risk of serious damage to eyes.
R68:Possible risk of irreversible effects.
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment .
R22:Harmful if swallowed.
Safety Statements 
S15:Keep away from heat .
S24/25:Avoid contact with skin and eyes .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S61:Avoid release to the environment. Refer to special instructions safety data sheet .
S49:Keep only in the original container .
S47:Keep at temperature not exceeding ... E C (to be specified by the manufacturer) .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
RIDADR  3236
RTECS  SM4725000
TSCA  TSCA listed
REACH Registrations Active
HazardClass  4.1
PackingGroup  II
HS Code  2908990000
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.
Hazardous Substances Data 104-91-6(Hazardous Substances Data)
Toxicity
mmo-sat 50 mg/plate FCTXAV 18,523,80

Raw materials And Preparation Products

Hazard Information

Material Safety Data Sheet(MSDS)