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NIOSH

HYDRAZINE

ICSC: 0281

Diamide
Diamine
Nitrogen hydride
(anhydrous)
N2H4 / H2NNH2
Molecular mass: 32.1
ICSC # 0281 		CAS # 302-01-2
RTECS # MU7175000
UN # 2029
EC # 007-008-00-3
March 13, 1995 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Flammable.
NO open flames, NO sparks, and NO smoking.
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION Above 38°C explosive vapour/air mixtures may be formed. Risk of fire and explosion on contact with many materials.
Above 38°C use a closed system, ventilation, and explosion-proof electrical equipment.
In case of fire: keep drums, etc., cool by spraying with water. Combat fire from a sheltered position.
EXPOSURE
STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
•INHALATION Corrosive. Burning sensation. Cough. Headache. Nausea. Shortness of breath. Sore throat. Convulsions.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Refer for medical attention.
•SKIN Corrosive. MAY BE ABSORBED! Redness. Skin burns. Pain.
Protective gloves. Protective clothing.
First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention. Wear protective gloves when administering first aid.
•EYES Corrosive. Redness. Pain. Severe deep burns.
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 Corrosive. Abdominal cramps. Confusion. Convulsions. Unconsciousness. Vomiting. Weakness.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Do NOT induce vomiting. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Evacuate danger area! Consult an expert! 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. Do NOT let this chemical enter the environment. Personal protection: complete protective clothing including self-contained breathing apparatus.
Fireproof. Separated from food and feedstuffs . See Chemical Dangers.
Special material. Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
Note: E
T symbol
N symbol
R: 45-10-23/24/25-34-43-50/53
S: 53-45-60-61
UN Hazard Class: 8
UN Subsidiary Risks: 3 and 6.1
UN Packing Group: I
ICSC: 0281 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.

HYDRAZINE

ICSC: 0281

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PHYSICAL STATE; APPEARANCE:
COLOURLESS FUMING AND HYGROSCOPIC LIQUID , WITH PUNGENT ODOUR.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance decomposes producing ammonia fumes, hydrogen and nitrogen oxides , causing fire and explosion hazard. The substance is a strong reducing agent and reacts violently with oxidants. The substance is a medium strong base. Reacts violently with many metals, metal oxides and porous materials causing fire and explosion hazard. Air or oxygen is not required for decomposition.

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).
OSHA PEL†: TWA 1 ppm (1.3 mg/m3) skin
NIOSH REL: Ca C 0.03 ppm (0.04 mg/m3) 2-hour See Appendix A
NIOSH IDLH: Ca 50 ppm See: 302012


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 and the skin. The vapour of this substance is corrosive to the respiratory tract. Inhalation of the vapour may cause lung oedema (see Notes). The substance may cause effects on the liver kidneys and central nervous system . Exposure may result in death. The effects may be delayed. Medical observation is indicated.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. The substance may have effects on the liver , kidneys and central nervous system . This substance is possibly carcinogenic to humans.

PHYSICAL
PROPERTIES

Boiling point: 114°C
Melting point: 2°C
Relative density (water = 1): 1.01
Solubility in water: very good
Vapour pressure, kPa at 20°C: 1.4
Relative vapour density (air = 1): 1.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Flash point: 38°C c.c.
Auto-ignition temperature: see Notes
Explosive limits, vol% in air: 1.8-100
Octanol/water partition coefficient as log Pow: -3.1

ENVIRONMENTAL
DATA

The substance is very toxic to aquatic organisms.

N O T E S

Auto-ignition temperature varies from 24°C on a rusty iron surface to 270°C on glass surface. 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. Other UN numbers are: UN 2030 Hydrazine hydrate or Hydrazine, aqueous solutions with 37-64% of hydrazine; UN 3293 Hydrazine, aqueous solutions with not more than 37% of hydrazine. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, EU classification, Emergency Response.
Transport Emergency Card: TEC (R)-80S2029

NFPA Code: H3; F3; R2

ADDITIONAL INFORMATION



ICSC: 0281 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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