SHEET /m/oleic-acid · PubChem CID 445639 · CAS 112-80-1 · REV 2026.07
Oleic acid from source
C18H34O2 · 282.5 g/mol
cis-9-Octadecenoic acid · (Z)-Octadec-9-enoic acid · Wecoline OO · Vopcolene 27
monounsaturated omega-9 fatty acid, abbreviated with a lipid number of 18:1 cis-9
Fig. 1 · 2D structure RDKit
CCCCCCCC/C=C\CCCCCCCC(=O)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 Oleic acid is 74,000 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
74,000 mg/kg · very low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
3 more reported values
- 2.4 mg/kgLD50 · iv · rat
- 230 mg/kgLD50 · iv · mouse
- 3,000 mg/kgLD50 · dermal · guinea pig
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