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1,1-Dimethylhydrazine
1,1-Dimethylhydrazine
- CAS:
- 57-14-7
- MF:
- C2H8N2
- MW:
- 60.1
Properties
- Melting point:
- -57.2 °C
- Boiling point:
- 60-62 °C(lit.)
- Density
- 0.79 g/mL at 20 °C(lit.)
- vapor density
- 1.94 (vs air)
- vapor pressure
- 103 mm Hg ( 20 °C)
- refractive index
- n
20/D 1.4075(lit.)
- Flash point:
- 34 °F
- storage temp.
- 2-8°C
- solubility
- Miscible with alcohol, N,N-dimethylformamide, ether, hydrocarbons (Windholz et al., 1983), and many other polar solvents.
- pka
- 8.19±0.18(Predicted)
- form
- Colorless liquid
- explosive limit
- 95%
- Water Solubility
- miscible
- Sensitive
- Hygroscopic
- Merck
- 14,3247
- BRN
- 605261
- Henry's Law Constant
- 2.45(x 10-9 atm?m3/mol) at 25 °C (quoted, Mercer et al., 1990)
- Exposure limits
- TLV-TWA skin 0.5 ppm (1.0 mg/m3 ) (ACGIH, MSHA, and OSHA); carcinogenicity: Animal Sufficient Evidence (IARC), Suspected Carcinogen (ACGIH).
Safety Information
- Symbol(GHS)
GHS02,GHS05,GHS06,GHS08,GHS09
- Signal word
- Danger
- Hazard statements
- H225-H301+H311+H331-H314-H335-H350-H411
- Precautionary statements
- P210-P273-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338
- Hazard Codes
- F,T,N
- Risk Statements
- 45-11-23/25-34-51/53-37-23/24/25
- Safety Statements
- 53-45-61-36/37
- RIDADR
- UN 1163 6.1/PG 1
- OEL
- Ceiling: 0.06 ppm (0.15 mg/m3) [2-hr]
- WGK Germany
- 3
- RTECS
- MV2450000
- Autoignition Temperature
- 478 °F
- HazardClass
- 6.1
- PackingGroup
- I
- HS Code
- 29280090
- Toxicity
- Acute oral LD50 for rats 122 mg/kg, mice 265 mg/kg (quoted, RTECS, 1985).
- IDLA
- 15 ppm
Use
1,1-Dimethylhydrazine is a colorless, flammable, hygroscopic liquid that gradually turns yellow on contact with air and is miscible with water. 1,1-Dimethylhydrazine is primar- ily used as a high-energy fuel in military applications, as a rocket propellant and fuel for thrusters, and small electrical power-generating units. 1,1-Dimethylhydrazine is also used in the manufacture of a plant growth regulator, in chemical synthesis, in photographic chemicals, as a stabilizer for fuel additives, and as an absorbent for acid gases. Exposure to 1,1-dimethylhydrazine usually occurs at the workplace during use and handling of the chemical substance. No information is available on the carcinogenic effects of 1,1-dimethylhydrazine in humans. Carcinogenic effects were observed in mice and rats exposed to 1,1-dimethylhydrazine by inhalation, but the carcinogenicity could not be defi nitively attributed to 1,1-dimethylhydrazine because of the presence of contaminants in the study. The US EPA has not classifi ed 1,1-dimethylhydrazine for potential carcinogenicity, while the IARC has classifi ed 1,1-dimethylhydrazine as Group 2B, meaning a possible human carcinogen.
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