295698

Sulfur dioxide

≥99.9%

• Synonym(s): Sulfurous anhydride, Sulfurous oxide, Sulphur dioxide
• Linear Formula: SO₂
• CAS Number: 7446-09-5
• Molecular Weight: 64.06
• Beilstein/REAXYS Number: 3535237
• EC Number: 231-195-2
• MDL number: MFCD00011450
• UNSPSC Code: 12142100
• PubChem Substance ID: 24857804
• NACRES: NA.22
• assay: ≥99.9%

Properties

• vapor density: 2.26 (21 °C, vs air)
• Quality Level: 200
• 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

Description

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

Safety Information

• pictograms: GHS04,GHS06,GHS05
• signalword: Danger
• hcodes: H280,H314,H331
• pcodes: P260 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P410 + P403
• Hazard Classifications: Acute Tox. 3 Inhalation - Eye Dam. 1 - Press. Gas Liquefied gas - Skin Corr. 1B
• Storage Class: 2A - Gases
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Faceshields, Gloves, Goggles, multi-purpose combination respirator cartridge (US)