Usage of oxalic acid:
1. In metallurgy industry: As precipitating and separating function for rare-earth metal.
2. In pharmaceutical industry: Used in tetracycline, oxytetracycline, phenobarbital, and borneol, etc.
3. In light industry: Polishing for marble, rust-remover, bleaching, dirt-remover, leather-processing, wood, and aluminium products etc.
4. In dyeing and printing industry: As reducing agent for dyeing and printing industry, as bleaching agent for textile, substitute for acetic acid, as coloring mordant for fast pigment dyestuff.
5. In organic synthetic: Used in 2133 resin, urea-formaldehyde molding powder, butadiene catalyst, etc.
6. In electron industry: Preparation of chemicals raw material for porcelain capacitor, preparation of electron equipment detergent.
7. In other aspects: Food preccessing additive, As analysis reagent, raw material of chemicals