What are the main uses of oxalic acid (CAS: 144-62-7)?

Oxalic acid has diverse applications, including as a cleaning agent, a reducing agent in chemical synthesis, and a component in some pharmaceuticals. It is used in the textile industry for dyeing and in metal processing for removing rust. In food, it is present in small amounts in certain fruits and vegetables. Researchers also use it in analytical chemistry for its ability to complex metal ions and in the preparation of other compounds.