Hydrazine

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Hydrazine

Hydrazine hydrate
Identifiers
CAS number 302-01-2 YesY
PubChem 9321
ChemSpider 8960 YesY
UNII 27RFH0GB4R YesY
EC nummer 206-114-9
UN nummer 2029
KEGG C05361 YesY
MeSH Hydrazine
ChEBI CHEBI:15571 YesY
ChEMBL CHEMBL1237174 N
RTECS nummer MU7175000
Beilstein Reference 878137
Gmelin Reference 190
3DMet B00770
Jmol-3D images Image 1
Properties
Molecular formula N
2
H
4
Molar mass 32.0452 g mol-1
Appearance Colourless liquid
Density 1.021 g cm-3
Meltin pynt

2 °C, 275 K, 35 °F

Boilin pynt

114 °C, 387 K, 237 °F

log P 0.67
Vapor pressure 1 kP (at 30.7 °C)
Acidity (pKa) 8.10[3]
Basicity (pKb) 5.90
Refractive index (nD) 1.46044 (at 22 °C)
Viscosity 0.876 cP
Structure
Molecular shape Triangular pyramidal at N
Dipole moment 1.85 D[4]
Thermochemistry
Std enthalpy o
formation
ΔfHo298
50.63 kJ mol-1
Staundart molar
entropy
So298
121.52 J K-1 mol-1
Hazards
MSDS ICSC 0281
GHS pictograms The flame pictogram in the Globally Harmonized Seestem o Classification an Labelling o Chemicals (GHS) The corrosion pictogram in the Globally Harmonized Seestem o Classification an Labelling o Chemicals (GHS) The skull-an-crossbones pictogram in the Globally Harmonized Seestem o Classification an Labellin o Chemicals (GHS) The health hazard pictogram in the Globally Harmonized Seestem o Classification an Labellin of Chemicals (GHS) The environment pictogram in the Globally Harmonized Seestem o Classification an Labellin o Chemicals (GHS)
GHS signal wird DANGER
GHS hazard statements H226, H301, H311, H314, H317, H331, H350, H410
GHS precautionary statements P201, P261, P273, P280, P301+310, P305+351+338
EU Index 007-008-00-3
EU classification Toxic T Dangerous for the Environment (Naitur) N [5]
R-phrases R45, R10, R23/24/25, R34, R43, R50/53
S-phrases S53, S45, S60, S61
NFPA 704
NFPA 704.svg
4
4
3
Flash pynt 52 °C
Autoigneetion
temperatur
24–270 °C
Explosive leemits 1.8–99.99%
LD50 59–60 mg/kg (oral in rats, mice)[6]
Related compounds
Relatit compoonds Ammonia

Diphosphane
Tetrafluorohydrazine

 N (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Hydrazine (an aa cried diazane) is an inorganic compoond wi the formula N2H4. It is a colourless flammable liquid wi an ammonia-like odor. Hydrazine is heichly toxic an dangerously unstable unless haundled in solution. As o 2002, approximately 260,000 tons wur manufactured annually.[7] Hydrazine is mainly uised as a foamin agent in preparin polymer foams, but significant applications an aa include its uises as a precursor tae polymerization catalysts an pharmaceuticals. Addeetionally, hydrazine is uised in various rocket fuels an tae prepare the gas precursors uised in air bags. Hydrazine is uised within baith nuclear an conventional electrical pouer plant steam cycles as an oxygen scavenger tae control concentrations o dissolved oxygen in an effort tae reduce corrosion.

References[eedit | eedit soorce]

  1. 1.0 1.1 "hydrazine - PubChem Public Chemical Database". The PubChem Project. USA: National Center for Biotechnology Information. 
  2. "NIOSH Guide - Hydrazine". Centers for Disease Control. Retrieved 16 August 2012. 
  3. Hall, H.K., J. Am. Chem. Soc., 1957, 79, 5441.
  4. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth–Heinemann. ISBN 0080379419. 
  5. "Hydrazine safety data sheet". 
  6. Martel, B.; Cassidy, K. (2004). Chemical Risk Analysis: A Practical Handbook. Butterworth–Heinemann. p. 361. ISBN 1-903996-65-1. 
  7. Jean-Pierre Schirmann, Paul Bourdauducq "Hydrazine" in Ullmann's Encyclopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2002. doi:10.1002/14356007.a13_177.

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