Lead Plumbate

A hydrate of lead sesquioxide, which probably has the constitution Pb[Pb(OH)₆], is obtained as an amorphous, orange-yellow precipitate by decomposing an alkaline solution of the monoxide with potassium plumbate (Bellucci and Parravano).

Salts of Ortlioplumbic Acid, Pb(OH)₄. - Although orthoplumbic acid is unknown, its alkaline-earth salts have been prepared, and its lead salt is the important compound known as red lead.