Oxalic acid basically consists of the oxidation of carbohydrates or glucose by using nitric acid or air in the presence of vanadium pentoxide. Various precursors can be used including glycolic acid and ethylene glycol.
Oxalic acid is an organic compound, and its chemical formula is H2C2O4. The strong organic acid is a colorless solid crystal that dissolves in water to produce a colorless solution. It is classified as a dicarboxylic acid. In terms of strength, it is an acid about 3000 times stronger than acetic acid. It is found with harmless amounts in many plants in the acid form.