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.

To use oxalic acid, mix one-half cup of the powder in a gallon of warm water and mop it on the stain. Let it work for five to 10 minutes, keeping the stain wet, then scrub with a stiff-bristled ...

Today I offer you the generic alternative for three popular cleaning products: Bar Keepers […] Skip to content. All Sections. Subscribe Now. 85°F. Tuesday, July 1st 2025 ...

Oxalic acid, the toxic substance that police investigators blame for the deaths of those killed in the recent milk tea poisoning in Manila, appears harmless enough in its crystalline form as it looks ...

Other common acidic cleaning ingredients are oxalic acid, used for revitalising timber decks, hydrochloric acid in concrete and masonry cleaners, and sulfamic acid in potent toilet cleaners.

Oxalic acid, or oxalate, is a compound in many plant foods. In large quantities, it can inhibit the absorption of some nutrients. Learn more.