Safety data for hydrazine hydrate
General
- Synonyms: hydrazine monohydrate, diamide hydrate, aqueous hydrazine, hydrazine hydroxide, hydrazinium hydroxide
Use:
Molecular formula: N2H4.H2O
CAS No: 7803-57-8
EC No:
Physical data
- Appearance: colourless fuming liquid
Melting point: -52 C
Boiling point: 120 - 121 C
Vapour density:
Vapour pressure: 5.2 mm Hg at 20 C
Density (g cm-3): 1.027
Flash point: 74 C (closed cup)
Explosion limits: 3.4 - 100%
Autoignition temperature: 280 C
Water solubility: miscible
Stability
- Incompatible with a wide variety of materials, including oxidizing agents, heavy metal oxides, dehydrating agents, alkali metals, rust, silver salts. Combustible. Contact with many materials may cause fire or explosive decomposition. May react explosively with a variety of materials, including dehydrating agents, heavy metal oxides, perchlorates. Contact with cadmium, gold, brass, molybdenum and stainless steel containing > 0.5% molybdenum may cause rapid decomposition. Vapour may explode in fire. Note wide explosive limits - flammable from 4 to 100% hydrazine in air. Read safety data sheet fully before use.
Toxicology
- Toxic, and may be fatal, if inhaled, swallowed or absorbed through the skin. Expected to be a human carcinogen. Eye contact may cause serious damage. May cause CNS, eye, liver, kidney and lung damage. Possible sensitizer. Corrosive. Material is very irritating to respiratory tract, even a low concentrations. Typical OEL 0.02 ppm (8h TWA)
Toxicity data
(The meaning of any abbreviations which appear in this section is given here.)
ORL-RAT LD50 129 mg kg-1
ORL-MUS LD50 83 mg kg-1
SKN-RBT LDLO 20 mg kg-1
IHL-RAT LC50 0.75 mg/l/4h
ORL-GPG LD50 40 mg kg-1
Risk phrases
(The meaning of any risk phrases which appear in this section is given here.)
R23 R24 R25 R34 R43 R45 R50 R53.
Transport information
- IATA packing group 2. IATA sub-risk 61. Adr No 8/44B. UN No 2030. IATA class 8. Transport category 2. Not permitted on passenger flights.
Personal protection
- Safety glasses, gloves, good ventilation. Treat as a possible carcinogen. Remove all sources of ignition from the working area. Prepare a risk assessment before starting work.
Safety phrases
(The meaning of any safety phrases which appear in this section is given here.)
S45 S53 S60 S61.
[Return to Physical & Theoretical Chemistry Lab. Safety home page.]
This information was last updated on January 14, 2002. We have tried to make it as accurate and useful as possible, but can take no responsibility for its use, misuse, or accuracy. We have not verified this information, and cannot guarantee that it is up-to-date.
The "OEL," occupational exposure limit, of 0.02 parts per million is equivalent to about three tablespoons in an olympic-size swimming pool.