Oxalic acid

from source

C2H2O4 · 90.03 g/mol

ethanedioic acid · ethanedionic acid · dicarboxyl · hydrogen oxalate

What is Oxalic acid?

The sharp, chalky compound in rhubarb leaves, spinach, and star fruit. It binds calcium, which is why it forms the most common kind of kidney stone. Found in leafy greens. from source

CategoryPlant

Chemical familyCarboxylic Acids

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Fig. 1 · 2D structure RDKit

SMILESC(=O)(C(=O)O)O

Where you'll find it

Leafy greenswhat else is in it →

Curated by MoleculeFinder from source

Toxicity & hazards

DangerCorrosiveIrritantHealth hazardH302, H312, H314, H315, H318, H335, H361, H370, H371, H372, H373, H402, H412from source

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Where Oxalic acid leads

Sources & methodology

PubChem CID: 971
Wikidata: Q184832
Structure: PubChem → RDKit
Similar molecules: MoleculeFinder fingerprint similarity
Everyday relationships: MoleculeFinder editorial curation
Data refreshed: October 19, 2026

How MoleculeFinder sources and labels its data