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NIOSH

METHYL HYDRAZINE

ICSC: 0180

Monomethylhydrazine
MMH
CH6N2 / CH3NHNH2
Molecular mass: 46.1
ICSC # 0180 		CAS # 60-34-4
RTECS # MV5600000
UN # 1244
October 26, 2004 Validated

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 oxidants. NO contact with hot surfaces.
Powder, alcohol-resistant foam, water in large amounts, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive. Risk of fire and explosion on contact with oxidants and 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 or finger nails. Blue skin. Dizziness. Headache. Shortness of breath. Laboured breathing. Convulsions. Symptoms may be delayed (see Notes).
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, then remove contaminated clothes and rinse again. Refer for medical attention.
•EYES Redness. Pain. Severe deep burns.
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 take to a doctor.
•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 plenty of water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

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.
Fireproof. Separated from strong oxidants, strong acids, metal oxides, porous materials, food and feedstuffs . Dry. Well closed. Keep under inert gas.
Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
UN Hazard Class: 6.1
UN Subsidiary Risks: 3 and 8
UN Packing Group: I
ICSC: 0180 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

METHYL HYDRAZINE

ICSC: 0180

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PHYSICAL STATE; APPEARANCE:
COLOURLESS HYGROSCOPIC LIQUID , WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The vapour mixes well with air, explosive mixtures are formed easily.

CHEMICAL DANGERS:
May explode on heating oron contact with metal oxides. The substance may ignite spontaneously on contact with air and porous materials such as earth, asbestos, wood or cloth. The substance decomposes on burning producing toxic and corrosive gases including nitrogen oxides . The substance is a strong reducing agent and reacts violently with oxidants with fire hazard. The substance is a medium strong base. It reacts violently with strong acids .

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.01 ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans); (ACGIH 2004).
MAK: IIb (not established but data is available); skin absorption (H); sensitization of skin (Sh); (DFG 2004).
OSHA PEL: C 0.2 ppm (0.35 mg/m3) skin
NIOSH REL: Ca C 0.04 ppm (0.08 mg/m3) 2-hr See Appendix A
NIOSH IDLH: Ca 20 ppm See: 60344


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, the skin and the respiratory tract. Corrosive on ingestion. The substance may cause effects on the central nervous system , liver and blood , resulting in liver impairment and the formation of methaemoglobin. Exposure far above the OEL may result in 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 , resulting in liver impairment and the formation of methaemoglobin. This substance is possibly carcinogenic to humans.

PHYSICAL
PROPERTIES

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

ENVIRONMENTAL
DATA

The substance is toxic to aquatic organisms.

N O T E S

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 clothes (fire hazard) with plenty of water.
Transport Emergency Card: TEC (R)-61GTFC-I

NFPA Code: H4; F3; R2

ADDITIONAL INFORMATION



ICSC: 0180 METHYL HYDRAZINE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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