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1,1-DIMETHYLHYDRAZINE ICSC: 0147
Date of Peer Review: April 1994

Dimethylhydrazine
N,N-Dimethylhydrazine
CAS # 57-14-7 C2H8N2 / NH2-N(CH3)2
RTECS # MV2450000 Molecular mass: 60.1
UN # 1163
EC Index # 007-012-00-5
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking. NO contact with oxidants.
Powder, alcohol-resistant foam, water in large amounts, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive. Risk of fire and explosion.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Burning sensation. Sore throat. Cough. Headache. Laboured breathing. Nausea. Abdominal cramps. Vomiting.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Refer for medical attention.
Skin MAY BE ABSORBED! 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 Pain. Blurred vision. Severe deep burns. Permanent loss of vision.
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 Convulsions. (Further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Rest. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Collect leaking and spilled liquid in sealable non-plastic containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT absorb in saw-dust or other combustible absorbents. Do NOT let this chemical enter the environment. Personal protection: complete protective clothing including self-contained breathing apparatus.
Unbreakable packaging; put breakable packaging into closed unbreakable container.
EU Classification
Symbol: F, T, N
R: 45-11-23/25-34-51/53
S: 53-45-61
Note: [E]
UN Classification
UN Hazard Class: 6.1
UN Subsidiary Risks: 3 and 8
UN Pack Group: I
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GTFC-I
NFPA Code: H 3; F 3; R 1;
Fireproof. Provision to contain effluent from fire extinguishing. Separated from strong oxidants, strong acids. Keep in the dark. Do not store in copper or in alloys high in copper or in plastic.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
1,1-DIMETHYLHYDRAZINE ICSC: 0147
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS FUMING AND HYGROSCOPIC LIQUID, WITH PUNGENT ODOUR. TURNS YELLOW ON EXPOSURE TO AIR.

PHYSICAL DANGERS:
The vapour is heavier than air and may travel along the ground; distant ignition possible.

CHEMICAL DANGERS:
The substance may ignite spontaneously on contact with air. On combustion, forms toxic and/or flammable fumes including nitrogen oxides, hydrogen, ammonia, dimethylamine and hydrazoic acid. The substance is a strong reducing agent and reacts violently with oxidants like nitrogen tetroxide, hydrogen peroxide and nitric acid. The substance is a strong base, it reacts violently with acid and is corrosive. Reacts with oxygen causing fire and explosion hazard. Attacks plastic.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.01 ppm as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans); (ACGIH 2004).
MAK: skin absorption (H); sensitization of skin (Sh); Carcinogen category: 2; (DFG 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, 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 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Inhalation of the vapour may cause lung oedema (see Notes). The substance may cause effects on the central nervous system and liver, resulting in respiratory failure and liver impairment. Exposure to the vapour may result in death.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the nervous system, liver and blood. This substance is possibly carcinogenic to humans.
PHYSICAL PROPERTIES
Boiling point: 63C
Melting point: -58C
Relative density (water = 1): 0.8
Solubility in water: very good
Vapour pressure, kPa at 20C: 16.4
Relative vapour density (air = 1): 2.1
Relative density of the vapour/air-mixture at 20C (air = 1): 1.2
Flash point: -15C c.c.
Auto-ignition temperature: 249C
Explosive limits, vol% in air: 2-95
Octanol/water partition coefficient as log Pow: -1.9
ENVIRONMENTAL DATA
This substance may be hazardous to the environment; special attention should be given to fish.
NOTES
Depending on the degree of exposure, periodic medical examination is suggested. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. The odour warning when the exposure limit value is exceeded is insufficient. Rinse contaminated clothes (fire hazard) with plenty of water. Aerozine-50 and Dimazine are trade names. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005