What is "barium hydroxide"

n. white poisonous crystals; made by dissolving barium oxide in water

Barium hydroxide are chemical compounds with the chemical formula Ba(OH)(HO). The monohydrate (x =1) is known as baryta, or baryta-water, it is one of the principal compounds of barium. This white granular monohydrate is the usual commercial form.

This page provides supplementary chemical data on barium hydroxide.