SHEET /m/malic-acid · PubChem CID 525 · CAS 6915-15-7 · REV 2026.07
Malic acid
from sourceC4H6O5 · 134.09 g/mol
hydroxysuccinic acid · hydroxybutanedioic acid · apple acid · DL-hydroxysuccinic acid
What is Malic acid?
The green-apple sourness found in apples, grapes, and many other fruits. Malic acid (C4H6O5, 134 g/mol) is an organic acid found in everyday food and flavor. Found in wine and fruit. from source
Fig. 1 · 2D structure RDKit
C(C(C(=O)O)O)C(=O)OWhere you'll find it
Curated by MoleculeFinder from source
The dose makes the poison inferred
A reported rabbit oral LD50 for Malic acid is 3,000 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
3,000 mg/kg · very low toxicity · LD50 rabbit oral from source
The dose lens above scales this to a body weight.
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