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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)

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

Storage Class Code

2A - Gases

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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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Sulfur trioxide trimethylamine complex

Sigma-Aldrich

135879

Sulfur trioxide trimethylamine complex

Synthesis and cyclopolymerization of diallylammoniomethanesulfonate
Ali, Shaikh A and Al-Hamouz OCS
Polym. Eng. Sci., 53(11), 2378-2388 (2013)
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)
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)
Sulfur dioxide and asthma--a double-edged sword?
D Sheppard
The Journal of allergy and clinical immunology, 82(6), 961-964 (1988-12-01)
[Role of sulfur dioxide and its derivatives in the pollution of man's natural environment].
K Gabryś et al.
Postepy higieny i medycyny doswiadczalnej, 34(5), 367-383 (1980-09-01)
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