Methyl nitrite

  • Nitrous acid, methyl ester
Formula
CH3NO2
Structure
Description
Liquid.

Registry Numbers and Inventories.
CAS
624-91-9
EC (EINECS/ELINCS)
210-870-5
RTECS
RA1050000
RTECS class
Mutagen
UN (DOT)
2455
Beilstein/Gmelin
1698447
Beilstein Reference
4-01-00-01253
Swiss Giftliste 1
G-5965
Canada DSL/NDSL
NDSL
US TSCA
Listed

Properties.
Formula
CH3NO2
Formula mass
61.05
Melting point, °C
-83
Boiling point, °C
-13
Vapor pressure, mmHg
2790 (25 C)
Critical temperature
154
Critical pressure
55
Density
0.991 g/cm3 (15C)
Solubility in water
Soluble
Surface tension
21 g/cm2 (-19 C)
Partition coefficient, pKow
0.51
Heat of vaporization
20.9 kJ/mol

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
Handle in accordance with all current regulations and standards. Subject to storage regulations: U.S. OSHA 29 CFR 1910.101.
Protection
Wear appropriate protective gloves, clothing and goggles. Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Stop leak if you can do it without risk. Do not touch or walk through spilled material. Do not direct water at spill or source of leak. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. If possible, turn leaking containers so that gas escapes rather than liquid. Prevent entry into waterways, sewers, basements or confined areas. Isolate area until gas has dispersed.
Stability
No data.
Incompatibilities
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.

Fire.
Flash Point,°C
-74
Fire fighting
DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED. SMALL FIRES: Dry chemical or carbon dioxide. LARGE FIRES: Water spray or fog. Move containers from fire area if you can do it without risk. FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Do not direct water at source of leak or safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.
Fire potential
EXTREMELY FLAMMABLE.
Hazards
May polymerize explosively when heated or involved in a fire. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Containers may explode when heated. Ruptured cylinders may rocket.
Combustion products
Fire may produce irritating and/or toxic gases.

Health.
Poison_Class
2
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Inhalation
May cause irritation.
   Skin
See inhalation.
   Eyes
May cause irritation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Vapors may cause dizziness or asphyxiation without warning. May be toxic if inhaled at high concentrations.
   Skin
Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
   Eyes
Flush with running water for at least 20 minutes.

Transport.
UN number
2455
Response guide
Hazard class
3.1