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METHYL NITRITE

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Name

METHYL NITRITE

EINECS 210-870-5
CAS No. 624-91-9 Density 1.1g/cm3
PSA 38.66000 LogP 0.31420
Solubility moderate

Stability

Toxicology

    No toxicological data available.

    Toxicity data
    (The meaning of any toxicological abbreviations which appear in this section is giv

Melting Point -16 C
Formula CH3 N O2 Boiling Point -12 C
Molecular Weight 61.0403 Flash Point N/A
Transport Information N/A Appearance gas
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 NOx. See also NITRITES and n-AMYL NITRITE. Risk Codes N/A
Molecular Structure Molecular Structure of 624-91-9 (Nitrous acid methyl ester) Hazard Symbols Severe explosion risk when shocked or heated. Toxic by inhalation, narcotic.
Synonyms

Methylnitrite (6CI)

Article Data 157

METHYL NITRITE Chemical Properties

Product Name: Methyl nitrite (CAS NO.624-91-9)


Molecular Formula: CH3NO2
Molecular Weight: 61.04002g/mol
Mol File: 624-91-9.mol
Einecs: 210-870-5
Melting Point: -16 °C, 257 K, 3 °F
Boiling point: -12 °C, 261 K, 10 °F
Density: 1.1 g/cm3
Surface Tension: 30.7 dyne/cm
Enthalpy of Vaporization: 22.84 kJ/mol
Vapour Pressure: 2790 mmHg at 25°C
XLogP3-AA: 0
H-Bond Donor: 0
H-Bond Acceptor: 3

METHYL NITRITE Production

Methyl nitrite can be prepared by the reaction of silver nitrite with a iodomethane:Silver nitrite (AgNO2) exists in solution as the silver ion, Ag+ and the nitrite ion, NO2. One of the lone pairs on an oxygen from nitrite ion attacks the methyl group (—CH3), releasing the iodide ion into solution. Unlike silver nitrite, silver iodide is highly insoluble in water and thus forms a solid. Note that nitrogen is a better nucleophile than oxygen and most nitrites would react via an SN2-like mechanism and the major product would be nitromethane. For example, sodium and potassium nitrite reacting with iodomethane would produce mostly nitromethane, with methyl nitrite as the minor product. However, the presence of the silver ion in solution has a stabilizing effect on the formation of carbocation intermediates, increasing the percent yield of methyl nitrite. In either case, some nitromethane and methyl nitrite are both formed.

 

METHYL NITRITE Toxicity Data With Reference

 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.

METHYL NITRITE Consensus Reports

Reported in EPA TSCA Inventory.

METHYL NITRITE Safety Profile

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 NOx. 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.

METHYL NITRITE Standards and Recommendations

DOT Classification:  Forbidden

METHYL NITRITE Specification

 Methyl nitrite ,its CAS NO. is 624-91-9,the synonyms is Nitrous acid methyl ester ; Nitrous acid methyl .

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