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METHYL HYDRAZINE
ICSC: 0180
Peer-Review Status: 26.10.2004 Validated
Monomethylhydrazine
MMH 
CAS #: 60-34-4 RTECS #: MV5600000
UN #: 1244
EINECS #: 200-471-4
    Formula: CH6N2 / CH3NHNH2
Molecular mass: 46.1

TYPES OF HAZARD
/ EXPOSURE
ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE-FIGHTING
FIRE Highly flammable. Many reactions may cause fire or explosion. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames, NO sparks and NO smoking. NO contact with strong oxidizing agents. NO contact with hot surfaces.  Use water in large amounts, powder, alcohol-resistant foam, carbon dioxide. 
EXPLOSION Vapour/air mixtures are explosive. Risk of fire and explosion on contact with oxidizing agents or metal oxides.  Closed system, ventilation, explosion-proof electrical equipment and lighting.  In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position. 
 
EXPOSURE   AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Burning sensation. Cough. Nausea. Vomiting. Blue lips, fingernails and skin. Dizziness. Headache. Shortness of breath. Laboured breathing. Convulsions. Symptoms may be delayed. See Notes.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Artificial respiration may be needed. Refer for medical attention. 
Skin MAY BE ABSORBED! Redness. Skin burns. Pain. Further see Inhalation.  Protective gloves. Protective clothing.  First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again. Refer for medical attention . 
Eyes Redness. Pain. Severe deep burns.  Wear face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Abdominal cramps. Burning sensation. Shock or collapse. Further see Inhalation.  Do not eat, drink, or smoke during work. Wash hands before eating.  Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT let this chemical enter the environment.  Unbreakable packaging.
Put breakable packaging into closed unbreakable container.
Do not transport with food and feedstuffs. 
EC Classification
 
UN Classification
UN Hazard Class: 6.1; UN Subsidiary Risks: 3 and 8; UN Pack Group: I 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H4; F3; R2.  Fireproof. Separated from strong oxidants, strong acids, metal oxides, porous materials and food and feedstuffs. Dry. Well closed. Keep under inert gas. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS HYGROSCOPIC LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
The vapour mixes well with air, explosive mixtures are easily formed. 

Chemical dangers
May explode on heating or on contact with metal oxides. The substance may ignite spontaneously on contact with air and porous materials such as earth, asbestos, wood and cloth. Decomposes on burning. This produces toxic and corrosive gases including nitrogen oxides. The substance is a strong reducing agent. It reacts violently with oxidants. This generates fire hazard. The substance is a medium strong base. Reacts violently with strong acids. 

Occupational exposure limits
TLV: 0.01ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans); (ACGIH 2004).
MAK (2b (not established but data is available)): Skin absorption (H); Sensitization of skin (SH); (DFG 2004). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion. 

Inhalation risk
A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. The substance may cause effects on the central nervous system, liver and blood. This may result in liver impairment and formation of methaemoglobin. Exposure far above the OEL could cause death. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
The substance may have effects on the liver and blood. This may result in liver impairment and formation of methaemoglobin. This substance is possibly carcinogenic to humans. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 87.5°C
Melting point: -52.4°C
Relative density (water = 1): 0.87
Solubility in water: miscible
Vapour pressure, kPa at 20°C: 4.8
Relative vapour density (air = 1): 1.6
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.03
Flash point: -8.3°C c.c.
Auto-ignition temperature: 196°C
Explosive limits, vol% in air: 2.5-97
Octanol/water partition coefficient as log Pow: -1.05  
The substance is toxic to aquatic organisms. 

NOTES
Depending on the degree of exposure, periodic medical examination is suggested.
Specific treatment is necessary in case of poisoning with this substance; the appropriate means with instructions must be available.
Do NOT take working clothes home.
Rinse contaminated clothing with plenty of water because of fire hazard. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.
    See Also:
       Toxicological Abbreviations