SHEET /m/acetic-acid · PubChem CID 176 · CAS 64-19-7 · REV 2026.07
Acetic acid
from sourceC2H4O2 · 60.05 g/mol
ethanoic acid · methanecarboxylic acid · ethylic acid · ethoic acid
What is Acetic acid?
The sour molecule that makes vinegar vinegar, and a tang in sourdough. Acetic acid (C2H4O2, 60 g/mol) is an organic acid found in everyday food and flavor. Found in wine and hot sauce. from source
Fig. 1 · 2D structure RDKit
CC(=O)OWhere you'll find it
Curated by MoleculeFinder from source
The dose makes the poison inferred
A reported rat oral LD50 for Acetic acid is 3,530 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
“The dose makes the poison” is a cross-species estimate shown as neutral science, not a threshold anyone should act on. Real toxicity depends on the person, not body mass alone.
Toxicity & hazards
Toxicity · LD50
3,530 mg/kg · very low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
4 more reported values
- 4,665 mg/kgLD50 · oral · rat
- 4,960 mg/kgLD50 · oral · mouse
- 525 mg/kgLD50 · iv · mouse
- 1,060 mg/kgLD50 · dermal · rabbit
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