Oxalic acid is widely used as a cleaning agent, particularly for removing rust and stains from various surfaces, including metals and fabrics. It is effective in wood bleaching, where it helps to lighten and restore the natural color of wood. In the textile industry, it is employed as a mordant in dyeing processes to fix colors onto fabrics. Additionally, oxalic acid is utilized in beekeeping to control varroa mites, which are harmful to bee colonies. It also finds application in analytical chemistry as a reagent for precipitating rare earth elements. In the pharmaceutical industry, it is used in the synthesis of certain drugs and as a component in some skincare products for its exfoliating properties.