Tin(II) hydroxide, Sn(OH)2, also known as stannous hydroxide, is an inorganic compound tin(II).

They are all white solids that are insoluble in water.

Crystals of Sn6O4(OH)4 has been characterized by X-ray diffraction.

The compound consists of an octahedron of Sn centers, each face of which is capped by an oxide or a hydroxide.

[3] Sn(OH)2 has been claimed to arise from the reaction of (CH3)3SnOH with SnCl2 in an aprotic solvent:[3] No crystallographic characterization is available on this material.