Tin(II) oxalate

Tin(II) oxalate, also known as stannous oxalate, is a chemical compound with the formula SnC₂O₄. It is a white or yellowish crystalline solid, practically insoluble in water, alcohol, and other common organic solvents. It is soluble in mineral acids.

Tin(II) oxalate is prepared by the reaction of a soluble tin(II) salt, such as tin(II) chloride, with oxalic acid or a soluble oxalate salt, such as sodium oxalate. The reaction precipitates tin(II) oxalate as a solid.

It is used as a catalyst in various organic reactions, particularly esterifications and transesterifications. It is also employed as a precursor in the synthesis of tin oxide materials. Due to its reducing properties, it has been used in applications such as metal plating and in the production of certain pharmaceuticals.

Tin(II) oxalate should be handled with care, as it is a source of tin and oxalate, which can be harmful if ingested or inhaled. It is advised to use appropriate personal protective equipment, such as gloves and eye protection, when handling this chemical. The compound decomposes upon heating, releasing toxic fumes.