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NIOSH

1,1-DIMETHYLHYDRAZINE

ICSC: 0147

Dimethylhydrazine
N,N-Dimethylhydrazine
unsym-Dimethylhydrazine
UDMH
C2H8N2 / NH2N(CH3)2
Molecular mass: 60.1
ICSC # 0147 		CAS # 57-14-7
RTECS # MV2450000
UN # 1163
EC # 007-012-00-5
November 12, 2008 Validated
Pu, hed in Series 2.

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 and acid(s). ;
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. Use non-sparking handtools.
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. Burning sensation. Nausea. Headache. Vomiting. Laboured breathing. Convulsions. 129000
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). from Skin burns. at update 2007, changed to irritant from corrosive.;
Protective gloves. Protective clothing.
First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention.
•EYES Redness. Pain.
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). animals at lethal or near-lethal doses, rat by oral and dog by inh);
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Rest. Do NOT induce vomiting. Refer immediately for medical attention. ve liquid; N.B.:corrosive but LD50<200 mg/kg: vomiting?;

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! Personal protection: complete protective clothing including self-contained breathing apparatus. Remove all ignition sources. 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 and remove to safe place. m Collect leaking and spilled liquid in sealable non-plastic containers as far as possible. at update 2007 due to no use of this phrase.; 1°C); 21245000
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 plastic. Store in an area without drain or sewer access. 63 and 13373; 22305000 ged from Do not store in copper or in alloys high in copper or in plastic. at update 2007.;
Unbreakable packaging: put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
Note: E
F symbol
T symbol
N symbol
R: 45-11-23/25-34-51/53
S: 53-45-61
UN Hazard Class: 6.1
UN Subsidiary Risks: 3 and 8
UN Packing Group: I
Signal: Danger
Flame-Skull-Health haz
Highly flammable liquid and vapour
Toxic if swallowed
Toxic in contact with skin
Fatal if inhaled vapour
Causes mild skin irritation
Causes eye irritation
Suspected of causing genetic defects
Suspected of causing cancer
Causes damage to organs
Causes damage to nervous system and blood through prolonged or repeated exposure if inhaled
Toxic to aquatic life
ICSC: 0147 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.

1,1-DIMETHYLHYDRAZINE

ICSC: 0147

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PHYSICAL STATE; APPEARANCE:
COLOURLESS FUMING AND HYGROSCOPIC LIQUID , WITH PUNGENT ODOUR. TURNS YELLOW ON EXPOSURE TO AIR. ACTERISTIC ODOUR. - deselected by chem. group;

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 and reacts violently with oxidants. The substance is a strong base, it reacts violently with acid and is corrosive. Reacts with oxygen causing fire and explosion hazard. Attacks plastic. , Changed from On combustion, forms toxic and/or flammable fumes including nitrogen oxides, hydrogen, ammonia, dimethylamine and hydrazoic acid. at update 2007.; 13363000

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.01 ppm; as TWA; (skin); A3 (confirmed animal carcinogen with unknown relevance to humans); (ACGIH 2008).
MAK: skin absorption (H); sensitization of skin (Sh);
Carcinogen category: 2;
(DFG 2008).
OSHA PEL: TWA 0.5 ppm (1 mg/m3) skin
NIOSH REL: Ca C 0.06 ppm (0.15 mg/m3) 2-hr See Appendix A
NIOSH IDLH: Ca 15 ppm See: 57147


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 , 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 . ingle TOST cat 1lung); 13751000 mulations (tremors and convulsions) may occur), Added at update 2007.; tory distress without lower respiratory tract irritation has been seen in exposed humans);

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the blood , resulting in anaemia . This substance is possibly carcinogenic to humans. enicity

PHYSICAL
PROPERTIES

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, mm2/s at 25 °C: 0.6

ENVIRONMENTAL
DATA

The substance is toxic to aquatic organisms. It is strongly advised that this substance does not enter the environment.

N O T E S

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. Do NOT take working clothes home. Rinse contaminated clothes with plenty of water because of fire hazard. Dimazine is trade name. pdate 2007 due to high risk of fire hazard.; at update 2007.; eted 'Aerozine-50' at update 2007 due to no info.;
Transport Emergency Card: TEC (R)-61GTFC-I

NFPA Code: H 4, F 3, R 1.

ADDITIONAL INFORMATION



ICSC: 0147 1,1-DIMETHYLHYDRAZINE
(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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