Oxalic Acid for Wood Bleach - 99.9% Pure Fine Powder - 2 lbs - Highly Effective Multipurpose Cleaner - Used as a Wood Stain Remover and Rust Remover - Industrial Grade Strength

Having a bunch of fun using this to remove rust from old tools. The quality seems normal. By which I mean I don’t have an analysis protocol to say for sure how perfectly it is what it says, but it looks & behaves differently from malic & citric acid. The crystals seem to be uniformly sized, a bit smaller than kosher salt flakes. When I forget to wear gloves, the back side of my fingernails stains brown and I have indifferent luck scraping it clean. (the nail extending from the end, not the nail bed. I suspect it’s reacting to something on the nail even tho I use a nail brush at least daily.) If you want to de-rust iron, this is one workable option.

This has removed multiple stains from my butcher block! Can’t believe I didn’t know. About this sooner!

Just had a new Denya counter with an oil finish put in 6 months ago. Had some metal canisters on the counter and a metal cup. Water was spilled on the counter and seeped under the canisters and cup. The metal reacted with the water staining the wood. I tried some home remedies first and nothing worked. I was terrified I'd have to call the installer to come out and sand it out. With nothing to lose, I decided to try the oxalic acid. Only giving 4 stars because it comes with no directions, usage guides, or precaution literature. It's an acid, it should come with some warnings. Anyway, I found some easy how-tos on youtube. It worked crazy good. Just applied a little of the solution, let it sit a minute, then rinsed. The counters look great! I did lightly sand some of the areas to see if that made a difference, it didn't seem to. But all the youtube videos say you should sand if there's a coating on the wood of any sort. As a side note, I poured the leftover into an old bathtub that had rust marks and it took those off too.

Got this to fix a pee stain on my wood floors. Made it invisible.

This has become my go-to oxalic acid when doing oxalic acid vaporizer treatments for varroa mites. My main reason for choosing this over other OA powders here is that this one is 99.9% (versus the typical 99.6%) pure, which reduces the likelihood of containing heavy metal compounds. Also, it has consistently maintained the lowest price for 99.9% OA. I will continue to use and recommend. I have also used this OA powder when making OA extended-release sheets (per ScientificBeekeeping). It dissolved well with warmed glycerin.

Works as supposed. cleaned my wood fence from stain of weed control product containing iron. Even after use of iron out, leaving cloud of black clouds on the wood.

Bought this for fixing a water stain on the top of some antique/vintage furniture. More than enough to do several furniture restorations.

I needed something to bleach out several dark areas on several boards on my hardwood floors. After much research, I settled in this product. Great value and very easy to use. The product comes sealed in a resealable bag. The instructions are clear and concise. Took a bit of work, but I did get a nice workout out of it Worked like a dream