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425478 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...
vapor density   2.8 (vs air)
vapor pressure   280 mmHg ( 25 °C)
InChI Key   AKEJUJNQAAGONA-UHFFFAOYSA-N
assay   ≥99%
contains   stabilizer
bp   44.7 °C(lit.)
mp   16.8 °C(lit.)
density   1.97 g/mL at 25 °C(lit.)

Description

Packaging

1.5 lb in stainless steel cylinder

Application

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

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.

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Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Precautionary statements 
Supplemental Hazard Statements 
Reacts violently with water.
RIDADR 
UN1829 - class 8 - PG 1 - Sulphur trioxide, stabilized
WGK Germany 
1
RTECS 
WT4830000
Protocols & Articles
Peer-Reviewed Papers
15

References

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