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Merck
CN

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:
7446-09-5
Molecular Weight:
64.06
UNSPSC Code:
12142100
NACRES:
NA.22
PubChem Substance ID:
24857804
EC Number:
231-195-2
Beilstein/REAXYS Number:
3535237
MDL number:
MFCD00011450
Assay:
≥99.9%

Key Documents

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assay

≥99.9%

InChI key

RAHZWNYVWXNFOC-UHFFFAOYSA-N

InChI

1S/O2S/c1-3-2

SMILES string

O=S=O

vapor density

2.26 (21 °C, vs air)

vapor pressure

1779 mmHg ( 21 °C)

bp

−10 °C (lit.)

mp

−73 °C (lit.)

density

1.25 g/mL at 25 °C (lit.)

Quality Level

200

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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:
  • 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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Danger

Storage Class

2A - Gases

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Faceshields, Gloves, Goggles, multi-purpose combination respirator cartridge (US)

target_organs

Respiratory system

Hazard Classifications

Acute Tox. 3 Inhalation - Eye Dam. 1 - Press. Gas Liquefied gas - Skin Corr. 1B - STOT SE 1 Inhalation

Regulatory Information

监管及禁止进口产品
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Certificates of Analysis (COA)

Lot/Batch Number
MKCX8466
MKCW8885
MKCV4023
MKCW2458
MKCS1213

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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
Yuan-Qiang Sun et al.
Chemical communications (Cambridge, England), 49(26), 2637-2639 (2013-02-26)
A coumarin-hemicyanine dye was reported for ratiometric fluorescent detection of SO2 derivatives HSO3(-) and SO3(2-) based on a novel addition-rearrangement cascade reaction.
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