ICSC 0180 - METHYL HYDRAZINE

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METHYL HYDRAZINE	ICSC: 0180 (October 2004)
Monomethylhydrazine MMH

CAS #: 60-34-4

UN #: 1244

EC Number: 200-471-4

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Highly flammable. Many reactions may cause fire or explosion. Gives off irritating or toxic fumes (or gases) in a fire. Vapour/air mixtures are explosive. Risk of fire and explosion on contact with oxidizing agents or metal oxides.	NO open flames, NO sparks and NO smoking. NO contact with strong oxidizing agents. NO contact with hot surfaces. Closed system, ventilation, explosion-proof electrical equipment and lighting.	Use water in large amounts, powder, alcohol-resistant foam, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position.

AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
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	CLASSIFICATION & 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.	According to UN GHS Criteria Transportation UN Classification UN Hazard Class: 6.1; UN Subsidiary Risks: 3 and 8; UN Pack Group: I
STORAGE
Fireproof. Separated from strong oxidants, strong acids, metal oxides, porous materials and food and feedstuffs. Dry. Well closed. Keep under inert gas.
PACKAGING
Unbreakable packaging. Put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.

METHYL HYDRAZINE

ICSC: 0180

PHYSICAL & CHEMICAL INFORMATION
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.	Formula: CH₆N₂ / CH₃NHNH₂ Molecular mass: 46.1 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

PHYSICAL & CHEMICAL INFORMATION

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.

Formula: CH₆N₂ / CH₃NHNH₂
Molecular mass: 46.1
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

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion. 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 the formation of methaemoglobin. Exposure far above the OEL could cause death. The effects may be delayed. Medical observation is indicated.	Inhalation risk A harmful contamination of the air can be reached very quickly on evaporation of this substance at 20°C. Effects of long-term or repeated exposure The substance may have effects on the liver and blood. This may result in liver impairment and the formation of methaemoglobin. This substance is possibly carcinogenic to humans.

EXPOSURE & HEALTH EFFECTS

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

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 the formation of methaemoglobin. Exposure far above the OEL could cause death. The effects may be delayed. Medical observation is indicated.

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

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

OCCUPATIONAL EXPOSURE LIMITS
TLV: 0.01 ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans). MAK: skin absorption (H); sensitization of skin (SH); carcinogen category: 2; germ cell mutagen group: 3B

ENVIRONMENT
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

EC Classification

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