Hydrazine

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Hydrazine
Skeletal formula o hydrazine wi aw explicit hydrogens addit
Spacefill model of hydrazine
Stereo, skeletal formula o hydrazine wi aw explicit hydrogens addit
Ball an stick model o hydrazine
Sample of hydrazine hydrate.jpg
Hydrazine hydrate
Names
Seestematic IUPAC name
Hydrazine[2]
Ither names
Diamine[1]
Diazane[2]
Identifiers
3D model (JSmol)
3DMet B00770
878137
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.005.560
EC Nummer 206-114-9
Gmelin Reference 190
KEGG
MeSH Hydrazine
RTECS nummer MU7175000
UNII
UN nummer 2029
Properties
N
2
H
4
Molar mass 32.0452 g mol-1
Appearance Colourless liquid
Density 1.021 g cm-3
Meltin pynt 2 °C; 35 °F; 275 K
Bylin pynt 114 °C; 237 °F; 387 K
log P 0.67
Vapour pressur 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
Structur
Molecular shape Triangular pyramidal at N
1.85 D[4]
Thermochemistry
Staundart molar
entropy
So298
121.52 J K-1 mol-1
Std enthalpy o
formation
ΔfHo298
50.63 kJ mol-1
Hazards
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
NFPA 704
Flammability code 4: Will rapidly or completely vaporize at normal atmospheric pressur an temperatur, or is readily dispersed in air an will burn readily. Flash pynt ablo 23 °C (73 °F). E.g., propaneHealth code 4: Very short exposur could cause daith or major residual injury. E.g., VX gasReactivity code 3: Capable of detonation or explosive decomposition but requires a strong initiatin soorce, must be heatit unner confinement afore initiation, reacts explosively wi watter, or will detonate if severely shocked. E.g., fluorineSpecial hazards (white): no codeNFPA 704 four-colored diamond
4
4
3
Flash pynt 52 °C
Explosive leemits 1.8–99.99%
Lethal dose or concentration (LD, LC):
59–60 mg/kg (oral in rats, mice)[6]
Relatit compoonds
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
YesY verify (whit is YesYN ?)
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 faemin agent in preparin polymer faems, 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. "NIOSH Guide - Hydrazine". Centers for Disease Control. Retrieved 16 August 2012. 
  2. 2.0 2.1 "hydrazine - PubChem Public Chemical Database". The PubChem Project. USA: National Center for Biotechnology Information. 
  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.

Freemit airtins[eedit | eedit soorce]