295698
Sulfur dioxide
≥99.9%
Synonym(s):
Sulfurous anhydride, Sulfurous oxide, Sulphur dioxide
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About This Item
Linear Formula:
SO2
CAS Number:
Molecular Weight:
64.06
Beilstein:
3535237
EC Number:
MDL number:
UNSPSC Code:
12142100
PubChem Substance ID:
NACRES:
NA.22
Recommended Products
vapor density
2.26 (21 °C, vs air)
Quality Level
vapor pressure
1779 mmHg ( 21 °C)
Assay
≥99.9%
bp
−10 °C (lit.)
mp
−73 °C (lit.)
density
1.25 g/mL at 25 °C (lit.)
SMILES string
O=S=O
InChI
1S/O2S/c1-3-2
InChI key
RAHZWNYVWXNFOC-UHFFFAOYSA-N
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Application
Sulfur dioxide is primarily used as a feedstock for the production of sulfuric acid (contact process). It is generally used in the synthesis of a variety of sulfur-containing organic compounds like alkyl/aryl sulfonyl chlorides, sulfinates, sultines, and polysulfone.
Packaging
Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed.
Compatible with the following:
Compatible with the following:
- Aldrich® lecture-bottle station systems
- Aldrich® lecture-bottle gas regulators
Other Notes
See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation
Legal Information
Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
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Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 3 Inhalation - Eye Dam. 1 - Press. Gas Liquefied gas - Skin Corr. 1B
Storage Class Code
2A - Gases
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Sulfur dioxide
Understanding Wine Chemistry, 4(7), 140-148 (2016)
Sulfur dioxide.
Ullmann's Encyclopedia of Industrial Chemistry (2000)
The development and application of sulfur dioxide surrogates in synthetic organic chemistry.
Emmett EJ and Willis MC
Asian Journal of Organic Chemistry, 4(7), 602-611 (2015)
Eliza Harris et al.
Science (New York, N.Y.), 340(6133), 727-730 (2013-05-11)
Global sulfate production plays a key role in aerosol radiative forcing; more than half of this production occurs in clouds. We found that sulfur dioxide oxidation catalyzed by natural transition metal ions is the dominant in-cloud oxidation pathway. The pathway
J Neil Cape et al.
Environment international, 29(2-3), 201-211 (2003-04-05)
The regulation of the emissions of 'traditional' primary air pollutants (fluorides, sulfur dioxide) has changed the pattern of exposure of ecological systems, with greatly reduced exposure close to sources, but with a smaller effect in some remote areas. Measurements show
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