Nitrous acid, methylester cas no:624-91-9

NameNitrous acid, methylester
CAS624-91-9
SynonymsMethylnitrite (6CI)
EINECS(EC#)210-870-5
Molecular FormulaCH3 N O2
Molecular Weight61.04002

Appearancegas
refractive index1.362

Hazardclass2.2

Hazard Severe explosion risk when shocked or heated. Toxic by inhalation, narcotic.
Safety

Moderately toxic by inhalation. Mutation data reported. Narcotic in high concentration. A very dangerous fire and explosion hazard when exposed to heat or flame. A heat-sensitive explosive more powerful than ethyl nitrite. When heated to decomposition it emits toxic fumes of NO_x. See also NITRITES and n-AMYL NITRITE.
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Silane will ignite spontaneously in air. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket.

 Nitrous acid methyl ester is an oxidizing agent. A heat-sensitive explosive. [Lewis]. The presence of metal oxides increases the thermal sensitivity. May, if mixed with reducing agents including hydrides, sulfides and nitrides begin a vigorous reaction that culminates in a detonation. Reacts with inorganic bases to form explosive salts.
Health Hazard Vapors may cause dizziness or asphyxiation without warning. Some may be toxic if inhaled at high concentrations. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating and/or toxic gases.

1.		mmo-sat 100 ppm		MUREAV    Mutation Research. 117 (1983),47.
2.		mma-sat 100 ppm		MUREAV    Mutation Research. 117 (1983),47.
3.		ihl-rat LC50:176 ppm/4H		FAATDF    Fundamental and Applied Toxicology. 8 (1987),101.