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75-52-5

Name Nitromethane
CAS 75-52-5
EINECS(EC#) 200-876-6
Molecular Formula CH3NO2
MDL Number MFCD00007400
Molecular Weight 61.04
MOL File 75-52-5.mol

Chemical Properties

Appearance Nitromethane is a highly flammable and explosive colorless liquid with a strong, disagreeable odor.
Melting point  -29 °C (lit.)
Boiling point  101.2 °C (lit.)
density  1.127 g/mL at 25 °C(lit.)
vapor density  2.1 (vs air)
vapor pressure  27.3 mm Hg ( 20 °C)
refractive index  n20/D 1.382(lit.)
Fp  95 °F
storage temp.  Flammables area
solubility  105g/l
form  Liquid
pka 10.2(at 25℃)
color  APHA: ≤10
Odor Disagreeable fruity odor
PH 6.4 (0.6g/l, H2O, 20℃)
PH Range 6.4 at 0.01 g/l at 20 °C
Relative polarity 6.8
explosive limit 7.3-63.0%(V)
Water Solubility  9.5 g/100 mL (20 ºC)
λmax λ: 380 nm Amax: 1.00
λ: 386 nm Amax: 0.50
λ: 395 nm Amax: 0.20
λ: 400 nm Amax: 0.10
λ: 405 nm Amax: 0.05
λ: 430-700 nm Amax: 0.01
Merck  14,6611
BRN  1698205
Henry's Law Constant 2.24 at 20.00 °C, 3.61 at 30.00 °C, 5.40 at 40.00 °C, 7.97 at 50.00 °C (inert gas stripping, Bene? and Dohnal, 1999)
Dielectric constant 22.7(Ambient)
Exposure limits NIOSH REL: IDLH 750 ppm; OSHA PEL: TWA 100 ppm (250 mg/m3); ACGIH TLV: TWA 20 ppm (adopted).
InChIKey LYGJENNIWJXYER-UHFFFAOYSA-N
CAS DataBase Reference 75-52-5(CAS DataBase Reference)
IARC 2B (Vol. 77) 2000
NIST Chemistry Reference Methane, nitro-(75-52-5)
EPA Substance Registry System 75-52-5(EPA Substance)

Safety Data

Hazard Codes  Xn,F,Xi
Risk Statements 
R5:Heating may cause an explosion.
R10:Flammable.
R22:Harmful if swallowed.
Safety Statements 
S41:In case of fire and/or explosion do not breathe fumes .
RIDADR  UN 1261 3/PG 2
WGK Germany  2
RTECS  PA9800000
3-10
Autoignition Temperature 784 °F
Hazard Note  Irritant/Flammable
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29042090
Safety Profile
Poison by ingestion and intraperitoneal routes. Moderately toxic by intravenous route. Mildly toxic by inhalation. In humans it may cause anorexia, nausea, vomiting, darrhea, kidney injury, and liver damage. exposed to heat, oxidizers, or flame. May explode by detonation, heat, or shock. Its sensitivity is increased when mixed with acids, bases, acetone, aluminum powder, ammonium salts + organic solvents, bis(2- aminoethyl)amine, 1,2-daminoethane + N,2,4,6-tetranitro-N-methyl aniLtne, halo forms (e.g., chloroform, bromoform), hydrazine + methanol. Ignites when mixed with alkyl metal halides (e.g., diethylaluminum bromide, dimethylaluminum bromide, ethylaluminum bromide iodide, methyl zinc iodide, methylaluminum diiodide). Can react violently with AlCl3 + organic matter, Ca(OH)2, m-methyl aniline, Ca(OCl)2, hexamethylbenzene, hydrocarbons, inorganic bases, hydroxides, organic amines, KOH, formaldehyde, nitric acid, metal oxides, 1,2-diaminomethane, litlvum perchlorate, sodium hydride. Reacts with aqueous silver nitrate to form the explosive silver fuhnate. When heated to decomposition it emits toxic fumes of NOx. See also NITROALKANES. A very dangerous fire hazard when exposed to heat, oxidizers, or flame. May explode by detonation, heat, or shock. Its sensitivity is increased when mixed with acids, bases, acetone, aluminum powder, ammonium salts + organic solvents, bis(2- aminoethyl)amine, 1,2-daminoethane + N,2,4,6-tetranitro-N-methyl aniLtne, halo forms (e.g., chloroform, bromoform), hydrazine + methanol. Ignites when mixed with alkyl metal halides (e.g., diethylaluminum bromide, dimethylaluminum bromide, ethylaluminum bromide iodide, methyl zinc iodide, methylaluminum diiodide). Can react violently with AlCl3 + organic matter, Ca(OH)2, m-methyl aniline, Ca(OCl)2, hexamethylbenzene, hydrocarbons, inorganic bases, hydroxides, organic amines, KOH, formaldehyde, nitric acid, metal oxides, 1,2-diaminomethane, litlvum perchlorate, sodium hydride. Reacts with aqueous silver nitrate to form the explosive silver fuhnate. When heated to decomposition it emits toxic fumes of NOx. See also NITROALKANES. concentrated sulfuric acid. When heated to decomposition it emits toxic fumes of NOx. See also NITRO COMPOUNDS and AMINES.
Hazardous Substances Data 75-52-5(Hazardous Substances Data)
Toxicity
LC (in air) in guinea pigs: 1000 ppm; LD50 orally in mice: 1.44 g/kg (Weatherby)
IDLA 750 ppm

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