Oxalic acid can be used as a reducing agent, bleaching agent, dyeing assistant, conditioning agent, additive, etc.^[1].

1. Oxalic acid is mainly used in the production of antibiotics and borneol, as well as solvents for refining rare metals, dye reducing agents, tanning agents, etc. In addition, oxalic acid can be used to synthesize various oxalate esters, oxalate salts, and oxalamides, with diethyl oxalate, sodium oxalate, and calcium oxalate being the most produced. Oxalic acid can also be used in the production of cobalt-molybdenum-aluminum catalysts, cleaning of metals and marble, and bleaching of textiles. It serves as an acidity regulator in the synthesis of adhesives such as urea-formaldehyde resin and melamine-formaldehyde resin. In the pharmaceutical industry, it is used to manufacture drugs like oxytetracycline and chlortetracycline.

2. It is primarily used as a reducing agent and bleaching agent, a mordant in the dyeing and printing industry, and also for refining rare metals and synthesizing various oxalate esters, oxalate salts, and oxalamides.