Substance

ID:175478

Names and Identifiers
Synonyms
SulfanSulfuric anhydrideSulfur trioxide
IUPAC Traditional name
sulfur trioxide
IUPAC name
sulfonylideneoxidane
IUPAC Systematic name
Sulfonylideneoxidane
Registration numbers
Wikipedia Title
Sulfur_trioxide
CAS Number
7446-11-9
CHEBI ID
29384
Chemspider ID
23080
EC Number
231-197-3
PubChem CID
24682
Gmelin ID
1448
Properties
Physical Property
Boiling Point
45°C
Std enthalpy of formation
−397.77 kJ/mol
Melting Point
16.9 °C, 290.1 K, 62.4 °F
Std molar entropy
256.77 J K−1 mol−1
Solubility
Reacts to give Sulfuric Acid in water
Density
1.92 g/cm3, liquid
Flash Point
Non-flammable
Safety Information
NFPA704
NFPA 704 diagram
0
3
3
OX
UN Number
UN 1829
Safety Statements
S1/2,S26,S30,S45,S53
EU Index
016-019-00-2
RTECS
WT4830000
Risk Statements
R14,R35,R37
Molecule Details
Molecular Spectra
No Data Available
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References
No Data Available
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