Sulfur dioxide
O2S64.07 g/mol Calculated
Also called sulfurous acid anhydride, sulfurous oxide and sulfurous anhydride.
The sharp smell of a struck match, the preservative that keeps dried apricots orange, and the sulfite on a wine label. Volcanoes emit it by the megatonne. Found in wine.
Sources and notes
- The introductionfrom sourceMoleculeFinder curated
- Other namesfrom sourceWikidataIts English label and aliases on Wikidata.
- Formula and weightcomputedPubChem
- 2D drawingcomputedPubChem structure, drawn by RDKit
- 3D modelfrom sourcePubChem 3D conformerLoaded after the page has painted, and on a phone only when you ask for it; the 2D drawing shows until it arrives.
Where you encounter it
Sulfur dioxide on our curated lists.
Drinks
WineAdded by the maker
Every product and list we hold
Sources and notes
- Our curated lists and their amountsfrom sourceMoleculeFinder curatedEach amount is an editorial figure from our food and drink lists, not a measurement of any one product.
- How it gets therefrom sourceMoleculeFinder curatedEach mark is set by hand on our lists, never inferred; a label's ingredient is added by the maker. A row with no mark data says Not marked.
Properties and sources
Calculated by PubChem
- Molecular formula
- O2S
- Molecular weight
- 64.07 g/mol
- XLogP3octanol/water, log units
- 0.1
- Polar surface areatopological
- 35.1 Ų
- H-bond donors
- 0
- H-bond acceptors
- 3
- Rotatable bonds
- 0
- Complexity
- 18
Reported Hazard label (GHS), ECHA, EU CLP Regulation, Safe Work Australia, HSDB via PubChem
Danger Compressed gas pictogram (GHS04), Corrosive pictogram (GHS05), Toxic pictogram (GHS06) and Health hazard pictogram (GHS08); hazard statements H280, H314, H318, H331, H370
Groups it belongs to
- Category
- Everyday chemistry
- Family
- Inorganic compounds
- Food and drink lists
- Wine
- Elements
- Sulfur
- Hazard classes
- Compressed gas, Corrosive, Acutely toxic, Health hazard, GHS Danger
- Size
- Under 100 g/mol
SMILES
O=S=OPubChem CID 1119 · Wikidata Q5282 · InChIKey RAHZWNYVWXNFOC-UHFFFAOYSA-N · Data refreshed
Questions
- What is Sulfur dioxide?
- The sharp smell of a struck match, the preservative that keeps dried apricots orange, and the sulfite on a wine label. Volcanoes emit it by the megatonne. Found in wine.
- Where is Sulfur dioxide found?
- Sulfur dioxide is found in wine. from source
- How toxic is Sulfur dioxide?
- Its GHS hazard label carries the signal word Danger and the hazard pictograms Compressed gas, Corrosive, Toxic and Health hazard. from source
- What kind of molecule is Sulfur dioxide?
- Sulfur dioxide has the formula O2S and a molecular weight of 64.07 g/mol. MoleculeFinder files it under inorganic compounds, in the everyday chemistry group. from sourcefrom sourcefrom sourcefrom source
- What else is Sulfur dioxide called?
- Sulfur dioxide is also called sulfurous acid anhydride, sulfurous oxide and sulfurous anhydride. from source
Sources and notes
- Calculated valuescomputedPubChemComputed from the structure, so no laboratory conditions apply; complexity is PubChem's own structural score.
- Hazard labelfrom sourceECHA, EU CLP Regulation, Safe Work Australia, HSDB via PubChemThe label combines these classifications.
- ECHAfrom sourceAttributionSource: European Chemicals Agency, echa.europa.eu.
- EU CLP Regulationfrom sourceAttributionSource: EUR-Lex, Regulation (EC) No 1272/2008, © European Union.
- Safe Work Australiafrom sourceAttributionSource: Safe Work Australia, Hazardous Chemical Information System, © Commonwealth of Australia, CC BY 4.0.
- Data refreshedfrom sourceMoleculeFinder2026-11-09