SHEET /m/aspirin · PubChem CID 2244 · CAS 50-78-2 · REV 2026.07
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Aspirin
from sourceC9H8O4 · 180.16 g/mol
acetylsalicylic acid · ASA · o-acetoxybenzoic acid · o-carboxyphenyl acetate
Also sold as Bayer, Bufferin, Ecotrin from source
What is Aspirin?
Acetylsalicylic acid, the original synthetic painkiller, made by acetylating the willow-bark compound salicylic acid in 1897. from source
CategoryOTC medicine
Fig. 1 · 2D structure RDKit
SMILES
CC(=O)OC1=CC=CC=C1C(=O)OWhere you'll find it
Curated by MoleculeFinder from source
Relative acute toxicity from source
Animal study data · LD50
- Reported LD50
- 200 mg/kg · moderately toxic
- Species
- rat
- Route
- oral
An LD50 describes acute toxicity under experimental conditions and is not a safe or dangerous dose for a person.
Toxicity & hazards
Toxicity · LD50
200 mg/kg · moderately toxic · LD50 rat oral from source
5 more reported values
- 250 mg/kgLD50 · oral · mouse
- 1,010 mg/kgLD50 · oral · rabbit
- 1,500 mg/kgLD50 · oral · rat
- 1,800 mg/kgLD50 · oral · rabbit
- 500 mg/kgLD50 · other · rabbit
DangerIrritantHealth hazardH302, H315, H316, H319, H334, H335, H360, H370, H371, H372, H373, H412from source
Keep roaming
Where Aspirin leads
Relatedcomputed
Salicylic acid45% similarBoth carry a carboxylic acid group.Anthranilic acid43% similarBoth carry a carboxylic acid group.Acetophenone38% similarBoth carry an aromatic ring.Mefenamic acid36% similarBoth carry a carboxylic acid group.Benzoic acid36% similarBoth carry a carboxylic acid group.Benzophenone36% similarBoth carry an aromatic ring.