Oxalic Acid

Oxalic acid is an organic compound found in many plants. These include leafy greens, vegetables, fruits, cocoa, nuts and seeds. In plants, it's usually bound to minerals, forming oxalate. The terms “oxalic acid” and “oxalate” are used interchangeably in nutrition science. Its acid strength is much greater than that of acetic acid. Oxalic acid is a reducing agent and its conjugate base, is a chelating agent for metal cations.


Molar Weight90.03 g/mol
Melting Point189 to 191 °C
Density1.6 - 1.7
FormsPowder, White

Uses and Applications

Key applications

  • Dyes
  • Metal working
  • Cleaning products
  • Reducing agent
  • Household industrial
  • Bleaching agent


  • Cleaning
  • Chemical Processing

Synonyms: Ethanedioic acid, Wood bleach, Dicarboxylic Acid, Ethanedionic Acid, Ethanedoic Acid, Oxalic Acid, Oxalic Acid Dihydrate

Chemical Formula: C₂H₂O₄

CAS Number: 144-62-7