Sulfur dioxide

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Sulfur dioxide
Skeletal formula sulphur dioxide wi assortit dimensions
Spacefill model o sulphur dioxide
Names
IUPAC name
Sulfur dioxide
Ither names
Sulfurous anhydride
Sulfur(IV) oxide
Identifiers
7446-09-5 YesY
Beilstein Reference 3535237
ChEBI CHEBI:18422 YesY
ChEMBL ChEMBL1235997 N
ChemSpider 1087 YesY
EC-nummer [1]
Gmelin Reference 1443
Jmol-3D images Image
KEGG D05961 YesY
MeSH Sulfur+dioxide
PubChem
RTECS nummer WS4550000
UNII 0UZA3422Q4 YesY
UN nummer 1079, 2037
Properties
SO
2
Molar mass 64.066 g mol−1
Appearance Colorless gas
Odour Just-struck match/eggs lik
Density 2.6288 kg m−3
Meltin pynt −72 °C; −98 °F; 201 K
Bylin pynt −10 °C (14 °F; 263 K)
94 g dm−3[1]
Vapour pressur 237.2 kPa
Acidity (pKa) 1.81
Basicity (pKb) 12.19
Viscosity 0.403 cP (at 0 °C)
Structure
Space group C2v
Coordination
geometry
Digonal
Molecular shape Dihedral
Dipole moment 1.62 D
Thermochemistry
Std enthalpy o
formation
ΔfHo298
-296.81 kJ mol−1
Staundart molar
entropy
So298
248.223 J K−1 mol−1
Hazards
EU clessification Toxic T
R-phrases R23, R34, R50
S-phrases (S1/2), S9, S26, S36/37/39, S45
NFPA 704
Flammability code 0: Will nae burn. E.g., watter Health code 3: Short exposur could cause serious temporary or residual injury. E.g., chlorine 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
Lethal dose or concentration (LD, LC):
3000 ppm (30 min inhaled, moose)
Related compounds
Relatit sulfur oxides Sulphur monoxide
Sulphur trioxide
Relatit compoonds Ozone

Selenium dioxide
Sulphurous acid
Tellurium dioxide

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

Sulphur dioxide (an aa sulfur dioxide) is the chemical compoond wi the formula SO
2
. At staundart atmosphere it is a toxic gas wi a pungent, irritatin an rotten smell. The triple pynt is 197.69 K an 1.67Kpa. It is released naiturally bi volcanic activity an is a potent global wairmin gas.

References[eedit | eedit soorce]

  1. Lide, David R., ed. (2006). CRC Handbook of Chemistry and Physics (87th ed.). Boca Raton, FL: CRC Press. ISBN 0-8493-0487-3.