Oxalic Acid

Oxalic acid has many roles as a bleach. Oxalic acid acts as a reducing agent for metal oxides to remove tarnish as well as rust or ink stains.

Oxalic acid is a dicarboxylic acid with a appearance of white crystals. It’s main applications include cleaning or bleaching, especially for removal of rust. About 25% of produced oxalic acid is used as a mordant in dyeing processes. It is used in bleaches, especially for pulpwood.

Oxalic acid C2H2O4 - Formula, Properties, Structure & Uses

Properties of Oxalic Acid

Chemical Formula: C2H2O4

Molecular Weight/ Molar Mass: 90.034 g·mol−1(anhydrous)

126.065 g·mol−1 (dihydrate)

Appearance: White crystals

Odor: Odorless

Density: 1.90 g·cm−3 (anhydrous, at 17 °C)

1.653 g·cm−3 (dihydrate)

Melting Point: 189 to 191 °C (372 to 376 °F; 462 to 464 K)

101.5 °C (214.7 °F; 374.6 K) Dihydrate

Solubility in Water: 90-100 g/L (20 °C)[2]

Solubility

237 g/L (15 °C) in ethanol

14 g/L (15 °C) in diethyl ether [3]

Vapor Pressure: <0.001 mmHg (20 °C)[4]

Acidity (pKa): 1.25, 4.14

Conjugate Base: Hydrogenoxalate

Magnetic susceptibility (χ): -60.05·10−6 cm3/mol

Oxalic acid - See more on https://en.wikipedia.org/wiki/Oxalic_acid

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Where is Oxalic acid found?

Oxalic acid is an organic compound found in many plants, including leafy greens, vegetables, fruits, cocoa, nuts, and seeds ( 1 ).

Oxalic acid uses

Oxalic acid has many roles as a bleach, metal polish, stain remover, and mordant.

It is used as a Bleaching agent for Straw hats, Leather, and Wood.

Oxalic acid acts as a reducing agent for metal oxides to remove tarnish as well as rust or ink stains.

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