Oxalic acid is an essential household chemical that can be used, like many acids, as a cleaner for various things; for example, as a rust remover, a cleaning agent, on wood work as a stain lifter, as a bleaching agent, and many more. This acid is a natural component of plants and vegetables that is also available in powered form. The mixture of Oxalic acid and water turn into a solution that at high doses is very dangerous, but at moderate doses it is safe for various useful functions.

Aside from bleaching, rust removing, and stain removing, oxalic acid is also used as a reducing agent in developing photographic film. You can also find it used in wastewater treatment as well since oxalic acid can effectively remove calcium from wastewater. And lastly, oxalic acid is also used as a grinding agent when polishing marble.