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
Jmol-3D images Image
Beilstein Reference 3535237
ChEBI CHEBI:18422 YesY
ChEMBL ChEMBL1235997 N
ChemSpider 1087 YesY
ECHA InfoCard 100.028.359
EC Nummer 231-195-2
E nummer E220 (preservatives)
Gmelin Reference 1443
KEGG D05961 YesY
MeSH {{{value}}}
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)
Structur
Space group C2v
Coordination
geometry
Digonal
Molecular shape Dihedral
Dipole moment 1.62 D
Thermochemistry
Staundart molar
entropy
So298
248.223 J K−1 mol−1
Std enthalpy o
formation
ΔfHo298
-296.81 kJ 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)
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

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.