CAS No.: 22326-55-2
Molecular formula: BaH4O3
Density: 3.743 g/mL at 25 °C(lit.)
Melting Point: 78 °C(lit.)
Molecular weight: 189.36
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Barium Hydroxide Monohydrate
Barium hydroxide is the chemical compound with the formula Ba(OH)2. Also known as baryta, or baryta-water, it is one of the principal compounds ofbarium. The white granular monohydrate is the usual commercial form. Barium hydroxide is used in analytical chemistry for the titration of weak acids, particularly organic acids. Its clear aqueous solution is guaranteed to be free of carbonate, unlike those of sodium hydroxide and potassium hydroxide, as barium carbonate is insoluble in water. This allows the use of indicators such as phenolphthalein or thymolphthalein (with alkaline colour changes) without the risk of titration errors due to the presence ofcarbonate ions, which are much less basic.
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