SHEET /m/acetaldehyde · PubChem CID 177 · CAS 75-07-0 · REV 2026.07
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Acetaldehyde from source
C2H4O · 44.05 g/mol
ethanal · acetic aldehyde · ethyl aldehyde · Acetylaldehyde
chemical compound
CategoryFood & flavor
Fig. 1 · 2D structure RDKit
CC=O
Where you'll find it
Not yet mapped to everyday foods or products.
The dose makes the poison inferred
A reported rat oral LD50 for Acetaldehyde is 661 mg/kg, the dose lethal to half the animals tested. Scaled by body mass alone:
46.3 g
a median lethal dose scaled to 154 lb (46,270 mg)
“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
661 mg/kg · low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
6 more reported values
- 1,930 mg/kgLD50 · oral · rat
- 212 mg/kgLD50 · iv · mouse
- 500 mg/kgLD50 · other · mouse
- 560 mg/kgLD50 · other · mouse
- 640 mg/kgLD50 · other · rat
- 3,540 mg/kgLD50 · dermal · rabbit
DangerFlammableToxicIrritantHealth hazardH224, H302, H311, H315, H317, H319, H332, H335, H336, H341, H350, H351, H360, H361, H370, H372, H402from source