Sodium oxalate solution is primarily used in analytical chemistry as a standardizing agent for potassium permanganate solutions in titrations. It acts as a reducing agent, allowing for precise determination of the concentration of permanganate solutions, which are commonly employed in redox titrations. Additionally, it is utilized in the calibration of equipment and procedures in laboratories to ensure accuracy and reliability in chemical analyses. In industrial settings, sodium oxalate solution can be employed in the purification of certain metals and in the treatment of wastewater to remove heavy metals through precipitation. It also finds application in the textile industry as a mordant in dyeing processes, helping to fix dyes onto fabrics. However, its use requires careful handling due to its toxicity and potential health hazards.