Oxalic Acid [C2H2O4] 99.8% ACS Grade Powder 8 Oz in a Space-Saver Bottle USA

Hello, there are a variety of applications for this product - I'm assuming this question has something to do with rust stain removal or wood bleaching - Metal stains from concrete, shingles, tile, and other surfaces can be slowly removed with a dilute solution of Oxalic acid in plain water (2 ounces per gallon). The same concentration can be used to lighten wood shingles, bleach them, and remove stains. However, the length of soak is crucial, which can be difficult to achieve, especially on a steeply sloped roof. For example, when using this product to remove rust stains from a pool (concreate / gunnite surfaces), it is necessary to use a pump to recycle the solution from the deep end and spray the entire pool surface in order to get enough time of contact for the product to be effective. Pretesting is a good idea, and safety equipment comes as standard.

Because this product dissolves in water, it is safe to use as a spray. There are numerous applications for oxalic acid. It removes rust, limescale, and oxidation from all metals (a bartender's best friend). It also sterilizes the environment and kills mites. It will get rid of the black mold, but it won't help with the stain that the mold left behind. It isn't a very good bleach.

This product is commonly used to remove rust stains from porcelain, concrete, plaster, tile, metals, crystals, and a variety of other materials; it reacts with the iron oxide in rust to form a water soluble "oxalate"; experiment with concentration, temperature, and soak time, as well as rubbing/abrasion, to get the best results; it will not harden the materials cleaned. It is recommended that you wear gloves and wear eye protection.

This product removes rust (red or orange) from a wide range of surfaces - When it comes into contact with rust, it forms a soluble Iron Oxalate that can be washed away - It is the active ingredient of " Barkeepers Friend" (5%) so this pure product is 20 times more concentrated when diluted in warm water - Put on safety equipment.