Oxalic acid solutions are the go-to cleaner for exterior redwood. If you recall your high school chemistry, you know that acidic solutions have a pH lower than 7.

According to Future Market Insights, the oxalic acid market is projected to grow from USD 1 billion in 2025 to USD 1.7 ...

Using that active ingredient, the chemist formulated an oxalic acid-based cleaning powder that he sold to taverns for use as a brass rail polish. Thrilled at the results, tavern owners dubbed the ...

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.