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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)
refractive index  1.5423 (estimate)
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
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
HazardClass  4.1
PackingGroup  II
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)