SHEET /m/lactic-acid · PubChem CID 612 · CAS 50-21-5 · REV 2026.07
Lactic acid
from sourceC3H6O3 · 90.08 g/mol
α-hydroxypropionic acid · milchsäure · milk acid · acidum lacticum
What is Lactic acid?
What builds up in hard-working muscles, and the tang in sour milk and yogurt. Lactic acid (C3H6O3, 90 g/mol) is an organic acid found in everyday food and flavor. Found in soy sauce. from source
Fig. 1 · 2D structure RDKit
CC(C(=O)O)OWhere you'll find it
Curated by MoleculeFinder from source
The dose makes the poison inferred
A reported rat oral LD50 for Lactic acid is 3,730 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
3,730 mg/kg · very low toxicity · LD50 rat oral from source
The dose lens above scales this to a body weight.
2 more reported values
- 4,875 mg/kgLD50 · oral · mouse
- 4,500 mg/kgLD50 · other · mouse
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