Oxalic acid is widely used as an acid rinse in laundries, where it is effective in removing rust and ink stains because it converts most insoluble iron compounds into a soluble complex ion.

Does oxalic acid dissolve rust?

A: Oxalic acid is a potent but toxic cleaner that removes rust and stains caused by iron, water and tannic acid. It's available in dry crystal form, to be dissolved in warm water for use. ... But if used safely and judiciously, outdoors and away from pets and children, it's effective for persistent rust problems.

Does rust react with oxalic acid?

Oxalic acid reacts with the rust (iron oxide) to form an iron oxalate compound which can be rinsed off of a surface such as a sink or bathtub.