It is produced in the body by metabolism of glyoxylic acid or ascorbic acid. It is not metabolized but excreted in the urine. It is used as an analytical reagent and general reducing agent.
POTASSIUM OXALATE gives basic aqueous solutions. Reacts as a base to neutralize acids in reactions that generate heat, but less than is generated by neutralization of the bases in reactivity group
Potassium oxalate is used as a water soluble source of oxalate for removing of rust stains and iron gall inks. It is also used as a cleaner for metals and wood, as a mordant in dyeing and as a photographic chemical