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
7783-06-4 YesY
3DMet B01206
Beilstein Reference 3535004
ChEBI CHEBI:16136 YesY
ChEMBL ChEMBL1200739 N
ChemSpider 391 YesY
EC-nummer [1]
Gmelin Reference 303
Jmol-3D images Image
KEGG C00283 YesY
MeSH Hydrogen+sulfide
PubChem
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]
Structure
Pynt group C2v
Molecular shape Bent
Dipole moment 0.97 D
Thermochemistry
Std enthalpy o
formation ΔfHo298		 −21 kJ mol−1[5]
Staundart molar
entropy So298		 206 J mol−1 K−1[5]
Speceefic heat capacity, C 1.003 J K−1 g−1
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]
Except whaur otherwise 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
2S. It is a colourless gas wi the chairactereestic foul odour o rotten eggs; it is hivier nor air, very poisonous, 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. 
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