FDC™ 99.6% PURE OXALIC ACID Powder | Multi Purpose

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#1 All-Natural, Bleaching Agent Used for Wood, Rust, Quartz, Pool Stains & Hundreds of Other Uses!

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Oxalic acid is an essential household chemical that can be used, like many acids, as a cleaner. For example, use 99.6% Pure Oxalic Acid as a rust remover, cleaning agent, wood stain lifter, bleaching agent, etc. Oxalic acid is a natural component of plants and vegetables (such as buckwheat and rhubarb) and is available for purchase in powdered form. Oxalic powder should be mixed with water to turn into Oxalic acid. At high doses, Oxalic acid is dangerous, but at moderate doses, it's safe in various applications and products.

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Key Features and Benefits 

  • GREAT FOR: rust removal, iron stain removal, bleaching agent, wood stain cleaner, quartz cleaner, pool stain remover & much more!
  • USE for home, industrial & commercial applications
  • SAFE resealable storage container with child resistant cap
  • BEEKEEPERS love using it too!

Directions For Use

For Dilution: You can either make it into a paste or create an acid bath. For an acid bath you can use between 1/2lb - 1lb of oxalic acid to 1 gallon of water depending on the application. If you'd like to create a paste use 3 parts oxalic acid to 1 part water ratio. A paste can be used for small areas like removing rust on nails and an acid bath can be used for bleaching wood or cleaning up a boat hull. If you'd like to make a spray solution, add 1 tablespoon of oxalic acid per 8oz of water. This can be used to treat rust stains on several applications.

Discard Acid Bath: To discard your acid solution, pour baking soda in it. The solution will bubble, so keep pouring it in until it stops bubbling. Then, use a pool test strip and measure the pH to be sure that all of the oxalic acid is neutralized. You'll want to make sure it reads higher than 7 (7.5 is ideal). At this point all of the acid will have converted to it's nitrous salt form that is safe and harmless. Feel free to dump it on your lawn (away from your pets reach as a pre-caution) or on your driveway if it's cold outside. It won't kill your grass, so you won't have to worry about it destroying your lawn.

General: Always handle oxalic acid in a well ventilated area. Keep out of reach of children. Always mix oxalic acid to water, not water to oxalic acid. Do not mix in metal containers as the chemical can eat away at it, use plastic or ceramic.

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hundreds of uses
Hundreds of Uses

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Home, Industrial & Commercial Applications

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Great For Beekeepers

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Some Oxalic Acid Uses Include..

boat hull rust remover
Cleans Boat Hulls
quartz polishing
Cleans & Bleaches Quartz
rusty shingles
Cleans Rusty Shingles


wood bleaching

laundry rust remover


Oxalic acid can be used as a bleaching agent for both wood and stone. Wood, when exposed to the elements, can turn gray. When oxalic acid is applied on an old and graying wood floor, it brings back the wood floor’s natural white color. Actually, this acid is often used when preparing to stain old wood floors. It is also used by furniture manufacturers to lighten heavily stained areas of wood furniture in preparation for refinishing.

Removes Stains

Oxalic acid effectively removes ink, food stains, and many other types of stains. It is a gentle stain remover that eats the stain but leaves the base surfaces, such as wood, intact. You can use oxalic acid to remove most stains found on stone, brick, linoleum, wood, clothing and vinyl surfaces. However, do not use oxalic acid if your flooring is sealed as it will eat through the finishing. Although you can also use oxalic acid to remove stains from fabrics such as linen and cotton, it will take a lot of time, so it is better to have your fabrics dry cleaned instead.

oxalic acid rust removal

Removes Rust in Common Areas

Oxalic acid powder is also used to remove rusts that are commonly found on plumbing pipes and kitchen countertops, and is a major ingredient found in commercial rust removers for sinks, tubs, and metal rust stains.

oxalic acid granules other uses

Other Uses 

Aside from bleaching, rust removing, and stain removing, oxalic acid granules is also used as a reducing agent in developing photographic film. You can also find it used in wastewater treatment as well since oxalic acid can effectively remove calcium from wastewater. And lastly, oxalic acid is also used as a grinding agent when polishing marble.


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