Oxalic acid appears as transparent, colorless crystals. It occurs naturally in many plants (wood sorrell, rhubarb, spinach). Once processed, it is corrosive and may be fatal if swallowed. When handling oxalic acid you should avoid contact with your eyes, skin, or clothing.
Oxalic Acid is used in a re-refining process in gold recovery. It is a very selective reducing agent towards gold because it’s salts exclusively reduces gold chloride solutions, producing very high purity (9999 and higher) gold.
Another popular use is bleaching and renewing wood to a beautiful natural state.
Mix three parts oxalic acid with one part warm water to create a paste. Use the paste on wood stained by water marks. The paste is used as a spot treatment and should not be used to cover an entire surface.
Oxalic acid is widely used in beekeeping primarily for controlling Varroa destructor mites, which are a microscopic parasite of honeybees affecting honey production.
Other uses include general metal and equipment cleaner, leather tanning, and bleaching textiles. Rust remover in mineral crystal preparation.
Oxalic Acid is also used in the following patina formulas:
- No. 17 for Deep Rust Red
- No. 32 Red (For Cast Brass)
For shipping, Oxalic Acid is in hazardous materials Class 8: Corrosive Substances. It only ships to destinations within the 48 contiguous US states and Canada using Standard Ground by FedEx or UPS • No air deliveries allowed • Customers in Canada should expect additional duties, taxes, and customs clearance service fees due upon delivery.
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