Hydrogen sulfide

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Hydrogen sulfide
Skeletal formula o hydrogen sulfide wi two dimensions
Baw-an-stick model o hydrogen sulfide
Spacefill model of hydrogen sulfide
Names
Seestematic IUPAC name
Hydrogen sulfide[1]
Ither names
Dihydrogen monosulfide

Dihydrogen sulfide
Sewer gas
Sulfane
Sulfurated hydrogen
Sulfureted hydrogen
Sulfuretted hydrogen
Sulfur hydride
Hydrosulfuric acid
Hydrothionic acid

Sulfhydric acid
Identifiers
Jmol-3D images Image
3DMet {{{value}}}
Beilstein Reference 3535004
ChEBI CHEBI:16136 YesY
ChEMBL ChEMBL1200739 N
ChemSpider 391 YesY
ECHA InfoCard 100.029.070
EC Nummer 231-977-3
Gmelin Reference 303
KEGG C00283 YesY
MeSH Hydrogen+sulfide
RTECS nummer MX1225000
UNII YY9FVM7NSN YesY
UN nummer 1053
Properties
H2S
Molar mass 34.08 g·mol−1
Appearance Colorless gas
Odour Rotten eggs
Density 1.363 g dm−3
Meltin pynt −82 °C (−116 °F; 191 K)
Bylin pynt −60 °C (−76 °F; 213 K)
4 g dm−3 (at 20 °C)
Vapour pressur 1740 kPa (at 21 °C)
Acidity (pKa) 7.0[2][3]
Basicity (pKb) 12.9
Refractive index (nD) 1.000644 (0 °C)[4]
Structur
Pynt group C2v
Molecular shape Bent
Dipole moment 0.97 D
Thermochemistry
Speceefic heat capacity, C 1.003 J K−1 g−1
Staundart molar
entropy
So298
206 J mol−1 K−1[5]
Std enthalpy o
formation
ΔfHo298
−21 kJ mol−1[5]
Hazards
Safety data sheet Freemit MSDS[6]
EU clessification Flammable F+ Very Toxic T+ Dangerous for the Environment (Naitur) N
R-phrases R12, R26, R50
S-phrases (S1/2), S9, S16, S36, S38, S45, S61
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., propane Health code 4: Very short exposur could cause daith or major residual injury. E.g., VX gas Reactivity code 0: Normally stable, even unner fire exposur condeetions, an is nae reactive wi watter. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash pynt −82.4 °C (−116.3 °F; 190.8 K) [9]
232 °C (450 °F; 505 K)
Explosive leemits 4.3–46%
Lethal dose or concentration (LD, LC):
713 ppm (rat, 1 hr)
673 ppm (moose, 1 hr)
634 ppm (mouse, 1 hr)
444 ppm (rat, 4 hr)[8]
600 ppm (human, 30 min)
800 ppm (human, 5 min)[8]
US health exposure limits (NIOSH):
C 20 ppm; 50 ppm [10-minute maximum peak][7]
C 10 ppm (15 mg/m3) [10-minute][7]
100 ppm[7]
Relatit compoonds
Relatit hydrogen chalcogenides
Watter
Hydrogen selenide
Hydrogen telluride
Hydrogen polonide
Hydrogen disulfide
Sulfanyl
Relatit compoonds
Phosphine
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

Hydrogen sulfide is the chemical compoond wi the formula H
2
S
. It is a colourless gas wi the chairactereestic foul odour o rotten eggs; it is hivier nor air, very pushionous, corrosive, flammable, an explosive.

References[eedit | eedit soorce]

  1. "Hydrogen Sulfide - PubChem Public Chemical Database". The PubChem Project. USA: National Center for Biotechnology Information. 
  2. Perrin, D.D. (1982). Ionisation Constants of Inorganic Acids and Bases in Aqueous Solution (2nd ed.). Oxford: Pergamon Press. 
  3. Bruckenstein, S.; Kolthoff, I.M., in Kolthoff, I.M.; Elving, P.J. Treatise on Analytical Chemistry, Vol. 1, pt. 1; Wiley, NY, 1959, pp. 432–433.
  4. Patnaik, Pradyot (2002). Handbook of Inorganic Chemicals. McGraw-Hill. ISBN 0-07-049439-8. 
  5. 5.0 5.1 Zumdahl, Steven S. (2009). Chemical Principles (6th ed.). Houghton Mifflin Company. p. A23. ISBN 0-618-94690-X. 
  6. http://msds.chem.ox.ac.uk/HY/hydrogen_sulfide.html
  7. 7.0 7.1 7.2 NIOSH Pocket Guide tae Chemical Hazards 0337
  8. 8.0 8.1 "Hydrogen sulfide". Immediately Dangerous to Life and Health. National Institute for Occupational Safety and Health (NIOSH). 
  9. "Hydrogen sulfide". npi.gov.au.