氢氧化铍是一种白色的固体，分子式为Be(OH)₂，是少数两性金属的氢氧化物，既溶于酸亦溶碱，短期大量接触可引起急性铍病，是致癌物质。

Beryllium hydroxide, Be(OH)₂, is an amphoteric hydroxide, dissolving in both acids and alkalis. Industrially, it is produced as a by-product in the extraction of beryllium metal from the ores beryl and bertrandite. The natural pure beryllium hydroxide is rare (in form of the mineral behoite, orthorhombic) or very rare (clinobehoite, monoclinic). When alkali is added to beryllium salt solutions the α-form (a gel) is formed. If this left to stand or boiled, the rhombic β-form precipitates. This has the same structure as zinc hydroxide, Zn(OH)₂, with tetrahedral beryllium centers.