The uses of oxalic acid include:
1. As a bleaching agent:
Oxalic acid is mainly used as a reducing agent and bleaching agent, used in the production of antibiotics and other drugs, as well as solvents for extracting rare metals, dye reducing agents, tanning agents, etc.
Oxalic acid can also be used in the production of cobalt-molybdenum-aluminum catalysts, the cleaning of metals and marbles, and the bleaching of textiles.
Used in metal surface cleaning treatment, rare earth element extraction, textile printing and dyeing, leather processing, catalyst preparation, etc.
2. As a reducing agent:
In the 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 in the production of polyvinyl chloride, amino plastic, urea-formaldehyde plastic, paint board, etc.
The dye industry is used to make basic greens.
In the printing and dyeing industry, it can replace acetic acid and be used as a dyeing aid and bleaching agent for pigments and dyes.
used in the pharmaceutical industry to manufacture chlortetracycline, oxytetracycline, tetracycline, streptomycin, etc.
In addition, oxalic acid can also be used to synthesize oxalate, oxalate, oxalamide and other products, among which diethyl oxalate, sodium oxalate, and calcium oxalate have the highest yields.
3. As a mordant:
Antimony oxalate can be used as a mordant, and ferric ammonium oxalate is a reagent for printing blueprints.
4. Derusting function:
Oxalic acid can be used to remove rust. But be careful when using it. Oxalic acid is very corrosive to stainless steel. High concentrations of oxalic acid are also easy to corrode hands. In addition, the acidic oxalate produced is highly soluble but has certain toxicity.
After skin contact with oxalic acid, rinse with water in time.
Buy a bottle of oxalic acid from a store that sells chemical reagents, take some, make a solution with warm water, and smear it on the rust stains. Then wipe with metallographic sandpaper, and finally spray paint. Stores that sell oxalic acid usually sell some medical equipment and glassware.