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744255

Sigma-Aldrich

Sulfur dioxide

≥99.98%

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About This Item

Linear Formula:
SO2
CAS Number:
7446-09-5
Molecular Weight:
64.06
Beilstein:
3535237
EC Number:
231-195-2
MDL number:
MFCD00011450
UNSPSC Code:
12142100
PubChem Substance ID:
329765683
NACRES:
NA.22

vapor density

2.26 (21 °C, vs air)

Quality Level

200

vapor pressure

1779 mmHg ( 21 °C)

Assay

≥99.98%

form

gas

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 (SO2) can be used:
  • In the palladium catalyzed aminosulfonylation reaction.
  • To prepare 1,4-diazabicyclo[2.2.2]octane [DABCO. (SO2)2] or DABSO, which is used as a reagent to synthesize N-aminosulfonamides via aminosulfonylation process using palladium catalyst.
  • To synthesize polysulfobetaine (PSB/SO2) copolymer.

Packaging

500ml high pressure aluminum cylinder equipped with a stainless steel valve according to DIN 477-1.

Other Notes

For 744255-450G-EU packaging: 500 mL of aluminium cylinder equipped with brass valve.

Recommended products

For 744255-450G-EU: outlet fitting: DIN 477-1 no. 1, Z742160 or Z742161 are the recommended regulators.

Signal Word

Danger

Hazard Statements

H280,H314,H331

Hazard Classifications

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

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

监管及禁止进口产品

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Palladium-catalysed aminosulfonylation of aryl-, alkenyl-and heteroaryl halides: scope of the three-component synthesis of N-aminosulfonamides
Emmett EJ, et al.
Organic & Biomolecular Chemistry, 10(20), 4007-4014 (2012)
Synthesis and cyclopolymerization of diallylammoniomethanesulfonate
Ali, Shaikh A and Al-Hamouz OCS
Polym. Eng. Sci., 53(11), 2378-2388 (2013)
DABCO-bis (sulfur dioxide), DABSO, as a convenient source of sulfur dioxide for organic synthesis: utility in sulfonamide and sulfamide preparation.
Woolven H, et al.
Organic Letters, 13(18), 4876-4878 (2011)
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
Sulfur dioxide and asthma--a double-edged sword?
D Sheppard
The Journal of allergy and clinical immunology, 82(6), 961-964 (1988-12-01)
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