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425478 Sigma-Aldrich

Sulfur trioxide

contains stabilizer, ≥99%

Synonym: Sulfuric anhydride

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Properties

Related Categories Chemical Synthesis, Oxidizing Agents, Specialty Gases, Sulfur-Based, Synthetic Reagents More...
Quality Level   100
vapor density   2.8 (vs air)
vapor pressure   280 mmHg ( 25 °C)
assay   ≥99%
contains   stabilizer
bp   44.7 °C (lit.)
mp   16.8 °C (lit.)
density   1.97 g/mL at 25 °C (lit.)
SMILES string   O=S(=O)=O
InChI   1S/O3S/c1-4(2)3
InChI key   AKEJUJNQAAGONA-UHFFFAOYSA-N

Description

General description

Sulfur trioxide (SO3) is an oxide of sulfur. It is released during the combustion of sulfur bearing fuels. Sulfur dioxide in the presence of vanadia catalyst oxidizes to form sulfur trioxide. The kinetics of this reaction has been studied. Density function theory and ab initio methods have been used to study the hydrolysis of SO3 to form sulfuric acid.

Application

Sulfur trioxide (SO3) may be used in the synthesis of methane sulfonic acid (MSA) by sulfonating methane.

Packaging

1.5 lb in stainless steel cylinder

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Precautionary statements 
Target organs 
Respiratory system
Supplemental Hazard Statements 
EUH014
RIDADR 
UN1829 - class 8 - PG 1 - Sulphur trioxide, stabilized
WGK Germany 
WGK 1
RTECS 
WT4830000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles
Peer-Reviewed Papers
15

References

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