Complexing agent, masking agent, precipitator, reducing agent. It is used for the determination of beryllium, calcium, chromium, gold, manganese, strontium and thorium. Microstructure analysis examines sodium and other elements. Calcium, magnesium, thorium and rare earth elements are precipitated. Calibration of standard solutions for potassium permanganate and cerium sulfate solutions. Bleaching agents. Auxiliaries. It can also be used to remove rust from clothes. Oxalic acid should be applied to remove alkali before painting exterior wall paint.

The pharmaceutical industry is used to manufacture chlortetracycline, oxytetracycline, streptomycin, borneol, vitamin B12, phenobarbital and other drugs. Printing and dyeing industry is used as color-developing aids, bleaching agents and pharmaceutical intermediates. The plastic industry is used to produce polyvinyl chloride, amino plastics and urea-formaldehyde plastics.

As a catalyst for the synthesis of phenolic resin, the catalytic reaction is mild, the process is relatively stable and the duration is the longest. Oxalic acid acetone solution can catalyze the curing reaction of epoxy resin and shorten the curing time. It is also used as a pH regulator for the synthesis of urea-formaldehyde resin and melamine-formaldehyde resin. The drying speed and bonding strength can also be improved by adding water-soluble polyvinyl formaldehyde adhesive. It is also used as curing agent and metal ion chelating agent of urea-formaldehyde resin. It can be used as an accelerator for the preparation of starch adhesive by KMnO4 oxidant, which can accelerate the oxidation rate and shorten the reaction time.

Bleaching agent

Oxalic acid is mainly used as reducing agent and bleaching agent. It is used to produce antibiotics, borneol and other drugs, as well as solvent, dye reductant and tanning agent for extracting rare metals.

Oxalic acid can also be used in the production of cobalt-molybdenum-aluminium catalysts, cleaning of metals and marbles and bleaching of textiles.

Used for metal surface cleaning and treatment, rare earth extraction, textile printing and dyeing, leather processing, catalyst preparation, etc.

As reducing agent

In organic synthesis industry, it is mainly used to produce hydroquinone, pentaerythritol, cobalt oxalate, nickel oxalate, gallic acid and other chemical products.

The plastic industry is used to produce polyvinyl chloride, amino plastics, urea-formaldehyde plastics, lacquer sheets, etc.

The dyestuff industry is used to produce salt base green and so on.

Printing and dyeing industry can replace acetic acid and be used as color auxiliaries and bleaching agents for pigment dyes.

The pharmaceutical industry is used to manufacture aureomycin, oxytetracycline, tetracycline, streptomycin and ephedrine.

In addition, oxalic acid can also be used to synthesize various oxalates, oxalates and oxalamides. Diethyl oxalate, sodium oxalate and calcium oxalate are the most productive products.

Mordant

Antimony oxalate can be used as mordant, and ammonium ferric oxalate is used to print blueprints.

Rust removing function

Oxalic acid can be used to remove rust. However, be careful when using oxalic acid on stainless steel has strong corrosiveness. High concentration of oxalic acid also corrodes hands easily. The acidic oxalate produced has high solubility, but has certain toxicity. When used, do not eat or drink. After skin contact with oxalic acid, it should be washed with water in time.

Method

Buy a bottle of oxalic acid in the shop where the chemical reagents are sold. Take some of it and mix it with warm water to form a solution and wipe it on the rust stain. Then rub it with metallographic sandpaper and finally spray paint. Oxalic acid shops usually sell some medical instruments, glass instruments.