Barium hydroxide monohydrate
Barium hydroxide monohydrate (CAS 22326-55-2, Ba(OH)₂ · H₂O) is a white crystalline solid with a molecular weight of 189.36 g/mol. This strong base is known for its corrosive properties and is primarily utilised in chemical synthesis, as a reagent in analytical chemistry, and in the production of other barium compounds. Its applications also extend to industries requiring high-purity materials.

Chemical Synthesis
Barium hydroxide monohydrate serves as a versatile reagent in organic and inorganic synthesis. It is employed to prepare other barium salts and can be used as a strong base in various chemical reactions.
Analytical Reagent
In analytical chemistry, it is used as a standard solution for the quantitative determination of acids and other substances. Its strong basicity makes it effective for titration purposes.
Production of Barium Compounds
This compound is a key intermediate in the manufacturing of various other barium salts, such as barium carbonate and barium sulfate, which have diverse industrial applications.
Lubricant Additives
It can be used in the formulation of greases and lubricants, contributing to their performance characteristics under specific conditions.
| Molecular weight | 189.36 |
|---|---|
| Linear formula | Ba(OH)2 · H2O |
| Assay | 98% |
| Density | 3.743 g/mL at 25 °C(lit.) |


Hazard statements
- H302Harmful if swallowed
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3262 8 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | C |
| Risk statements (R) | 20/22-34 |
| Safety statements (S) | 26-28-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Barium hydroxide monohydrate used for?
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Barium hydroxide monohydrate is used in chemical synthesis, as an analytical reagent, and for the production of other barium compounds. It also finds application in the formulation of lubricant additives.
What are the CAS number and formula for Barium hydroxide monohydrate?
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The CAS number is 22326-55-2 and the chemical formula is Ba(OH)₂ · H₂O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Barium hydroxide monohydrate with an assay of 98%. This product is supplied for research and industrial use; TSS does not represent it as USP, BP, or EP grade.
What are the main safety hazards associated with Barium hydroxide monohydrate?
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Barium hydroxide monohydrate is corrosive and can cause severe skin burns and eye damage (H314). It is also harmful if swallowed or inhaled (H302 + H332). Always handle with appropriate personal protective equipment, including gloves, eye protection, and respiratory protection.
How is Barium hydroxide monohydrate typically packed, shipped, or exported?
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Barium hydroxide monohydrate is shipped as UN 3262, Class 8, Packing Group III. TSS adheres to all relevant shipping regulations for hazardous materials for both domestic and international export.
How can I request a sample or a quote for Barium hydroxide monohydrate?
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To request a sample or obtain a quote, please contact our sales team via the website or by phone, providing your specific requirements and shipping details.
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