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.

Application

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