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Barium Hydroxide

Last updated: October 29, 2017

What Does Barium Hydroxide Mean?

Barium hydroxide is a chemical compound prepared from barium oxide when it is mixed with water. Barium hydroxide is used in corrosion inhibitors. The equation for the formation of barium hydroxide is:

BaO + 9H2O = Ba(OH)2.8H2O

Barium hydroxide may also be known as baryta.

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Corrosionpedia Explains Barium Hydroxide

For industrial usage, barium hydroxide is available in the form of monohydrate and octahydrade. Where the temperature is more than 500°C (932°F), barium hydroxide decomposes to barium oxide. When it comes in contact with carbon dioxide, it produces barium carbonate, which is aqueous in solution, highly alkaline and will undergo a neutralization reaction when in contact with acids. After a neutralization reaction with an acid, it forms barium sulfate and barium phosphate and thus is used to dehydrate and remove sulfate from various products.

Some physical properties of barium hydroxide:

  • Stability – Generally stable compound, but reacts when in contact with carbon dioxide, moisture or acids
  • Appearance – White transparent crystals
  • Specific gravity – 2.18
  • Melting point – 408°C (766°F)
  • Boiling point – 780°C (1,436°F)
  • pH value – approximately 2
  • Density – 2.18 g/cm3
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Synonyms

Baryta

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