ICSC 0147 - 1,1-DIMETHYLHYDRAZINE

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1,1-DIMETHYLHYDRAZINE	ICSC: 0147 (November 2008)
Dimethylhydrazine N,N-Dimethylhydrazine unsym-Dimethylhydrazine UDMH

CAS #: 57-14-7

UN #: 1163

EC Number: 200-316-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire. Vapour/air mixtures are explosive. Risk of fire and explosion on contact with oxidants.	NO open flames, NO sparks and NO smoking. NO contact with oxidizing agents or acids. Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling. Use non-sparking handtools.	Use powder, alcohol-resistant foam, water in large amounts, carbon dioxide. In case of fire: keep drums, etc., cool by spraying with water.

AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough. Sore throat. Burning sensation. Nausea. Headache. Vomiting. Laboured breathing. Convulsions.	Use ventilation, local exhaust or breathing protection.	Fresh air, rest. Half-upright position. Refer immediately for medical attention.
Skin	MAY BE ABSORBED! Redness. 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.	Wear face shield or eye protection in combination with breathing protection.	Rinse with plenty of water (remove contact lenses if easily possible).
Ingestion	Sore throat. Further see Inhalation.	Do not eat, drink, or smoke during work. Wash hands before eating.	Rinse mouth. Rest. Do NOT induce vomiting. Refer immediately for medical attention.

SPILLAGE DISPOSAL	CLASSIFICATION & LABELLING
Remove all ignition sources. 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 non-plastic containers. Do NOT absorb in saw-dust or other combustible absorbents. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.	According to UN GHS Criteria Highly flammable liquid and vapour Fatal if inhaled Toxic if swallowed or in contact with skin Causes mild skin irritation Causes eye irritation Suspected of causing genetic defects Suspected of causing cancer Causes damage to organs Causes damage to the nervous system and the blood through prolonged or repeated exposure if inhaled Toxic to aquatic life Transportation UN Classification UN Hazard Class: 6.1; UN Subsidiary Risks: 3 and 8; UN Pack Group: I
STORAGE
Fireproof. Provision to contain effluent from fire extinguishing. Separated from strong oxidants and strong acids. Dry. Well closed. Keep in a well-ventilated room. Do NOT store or transport in containers made from plastic. Store in an area without drain or sewer access.
PACKAGING
Unbreakable packaging. Put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.

1,1-DIMETHYLHYDRAZINE

ICSC: 0147

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance COLOURLESS FUMING 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 On combustion, forms toxic fumes including nitrogen oxides. The substance is a strong reducing agent. It reacts violently with oxidants. The substance is a strong base. It reacts violently with acid and is corrosive. Reacts with oxygen. This generates fire and explosion hazard. Attacks plastics.	Formula: C₂H₈N₂ / NH₂-N(CH₃)₂ Molecular mass: 60.1 Boiling point: 64°C Melting point: -58°C Relative density (water = 1): 0.8 Solubility in water: very good Vapour pressure, kPa at 20°C: 13.7 Relative vapour density (air = 1): 2.1 Relative density of the vapour/air-mixture at 20°C (air = 1): 1.2 Flash point: -15°C c.c. Auto-ignition temperature: 249°C Explosive limits, vol% in air: 2.4-20 Octanol/water partition coefficient as log Pow: -1.19 Viscosity: 0.6 mm²/s at 25°C

PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS FUMING 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
On combustion, forms toxic fumes including nitrogen oxides. The substance is a strong reducing agent. It reacts violently with oxidants. The substance is a strong base. It reacts violently with acid and is corrosive. Reacts with oxygen. This generates fire and explosion hazard. Attacks plastics.

Formula: C₂H₈N₂ / NH₂-N(CH₃)₂
Molecular mass: 60.1
Boiling point: 64°C
Melting point: -58°C
Relative density (water = 1): 0.8
Solubility in water: very good
Vapour pressure, kPa at 20°C: 13.7
Relative vapour density (air = 1): 2.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.2
Flash point: -15°C c.c.
Auto-ignition temperature: 249°C
Explosive limits, vol% in air: 2.4-20
Octanol/water partition coefficient as log Pow: -1.19
Viscosity: 0.6 mm²/s at 25°C

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation, through the skin and by ingestion. Effects of short-term exposure The substance is irritating to the eyes, skin and respiratory tract. Inhalation of the vapour may cause lung oedema. See Notes. The substance may cause effects on the central nervous system and liver.	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 blood. This may result in anaemia. This substance is possibly carcinogenic to humans.

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the eyes, skin and respiratory tract. Inhalation of the vapour may cause lung oedema. See Notes. The substance may cause effects on the central nervous system and liver.

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 blood. This may result in anaemia. 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: 3A

ENVIRONMENT
The substance is toxic to aquatic organisms. It is strongly advised not to let the chemical enter into the environment.

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 by an authorized person, should be considered. The odour warning when the exposure limit value is exceeded is insufficient. Do NOT take working clothes home. Rinse contaminated clothing with plenty of water because of fire hazard.

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 by an authorized person, should be considered.
The odour warning when the exposure limit value is exceeded is insufficient.
Do NOT take working clothes home.
Rinse contaminated clothing with plenty of water because of fire hazard.

ADDITIONAL INFORMATION

EC Classification
Symbol: F, T, N; R: 45-11-23/25-34-51/53; S: 53-45-61; Note: E

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