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1,2-DIMETHYLHYDRAZINE ICSC: 1662
April 2007
Symmetrical dimethylhydrazine
N,N'-Dimethylhydrazine
SDMH
PDF for printing Explanation of fields
CAS No: 540-73-8
RTECS No: MV2625000
UN No: 2382
EC No: 007-013-00-0
    C2H8N2 / H3CNHNHCH3
Molecular mass: 60.1

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 on contact with oxidants. 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 Cough. Sore throat. See Notes. Ventilation, local exhaust, or breathing protection. Fresh air, rest. Refer immediately for medical attention.
Skin MAY BE ABSORBED! See NOTES Protective gloves. Protective clothing. First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer immediately for medical attention.
Eyes Redness. Pain. Face shield and 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 See NOTES Do not eat, drink, or smoke during work. Wash hands before eating. Rinse mouth. Refer immediately 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. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT absorb in saw-dust or other combustible absorbents. EU classification
T Symbol
N Symbol
R: 45-23/24/25-51/53
S: 53-45-61
Note: E
UN classification
UN Hazard Class: 6.1
UN Subsidiary Risks: 3
UN Pack Group: I
GHS classification
Signal: Danger
Flame-Skull-Health haz
Highly flammable liquid and vapour
Fatal if swallowed
Fatal in contact with skin
Fatal if inhaled
Causes eye irritation
Suspected of causing genetic defects
May cause cancer
Causes damage to liver and kidneys through prolonged or repeated exposure

Do not transport with food and feedstuffs.


EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GTF1-1 Fireproof. Separated from strong oxidants. Well closed. Store in an area without drain or sewer access.

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 decomposes on burning producing toxic fumes including nitrogen oxides. The substance is a strong reducing agent and reacts with oxidants violently. Reacts violently with acids causing fire and explosion hazard. Attacks plastic, rubber and coatings.

Occupational exposure limits
TLV not established.
MAK: skin absorption (H); sensitization of skin (Sh); Carcinogen category: 2 (DFG 2006).

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 20°C.

Effects of short-term exposure
The substance is irritating to the eyes, and the respiratory tract. Exposure may result in death.

Effects of long-term or repeated exposure
The substance may have effects on the kidneys and liver, resulting in tissue lesions. This substance is probably carcinogenic to humans.


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 81°C
Melting point: -9°C
Density: 0.83 g/cm³
Solubility in water, g/100 ml at 25°C: 100
Vapour pressure, kPa at 25°C: 9
Relative vapour density (air = 1): 2.07
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.1
Flash point: < 5°C
Explosive limits, vol% in air: 2.4 - 20
Octanol/water partition coefficient as log Pow: -0.54 (estimated)
This substance may be hazardous in the environment; special attention should be given to fish.

NOTES
Insufficient data are available on the effect of this substance on human health, therefore utmost care must be taken.
Rinse contaminated clothes with plenty of water because of fire hazard.
Environmental effects from the substance have not been investigated.
Data on similar substances suggest that there may be environmental effects of this substance.

IPCS
International
Programme on
Chemical Safety
WHO ILO UNEP EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2006
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.

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