Tin(II) sulfate (SnSO<sub>4</sub>) is a chemical compound. It is a white solid that can absorb enough moisture from the air to become fully dissolved, forming an aqueous solution; this property is known as deliquescence. It can be prepared by a displacement reaction between metallic tin and copper(II) sulfate:
Tin(II) sulfate is a convenient source of tin(II) ions uncontaminated by tin(IV) species.
In the solid state the sulfate ions are linked together by O-Sn-O bridges. The tin atom has three oxygen atoms arranged pyramidally at 226 pm with the three O-Sn-O bond angles of 79ð, 77.1ð and 77.1ð. Other Sn-O distances are longer ranging from 295 - 334pm.