Barium oxide
Barium oxide (BaO), CAS 1304-28-5, is a white inorganic compound with a molecular weight of 153.33 g/mol. It exists as a powder or chunks and is known for its hygroscopic nature. Barium oxide is primarily utilised as a drying agent in various chemical applications due to its reactivity with water. It also finds use in the synthesis of other barium compounds and in specialized industrial processes.

Drying Agent
Barium oxide is an effective drying agent for gases and organic liquids, owing to its strong affinity for water. It can absorb moisture to form barium hydroxide.
Chemical Synthesis
It serves as a precursor in the production of other barium-containing chemicals. Its reactivity makes it a useful reagent in inorganic and materials science research.
Catalysis
Barium oxide can be employed as a component or promoter in certain catalytic systems, particularly in industrial chemical transformations.
| Molecular weight | 153.33 |
|---|---|
| Linear formula | BaO |
| Assay | 99.99% trace metals basis |
| Grade | technical grade |
| Form | powder and chunks |
| Density | 5.72 g/mL at 25 °C(lit.) |


Hazard statements
- H301Toxic if swallowed
- H314Causes severe skin burns and eye damage
- H332Harmful if inhaled
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- 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 1884 6.1 / PGIII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 20-25-34 |
| Safety statements (S) | 26-36/37/39-45 |
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 oxide used for?
+
Barium oxide (BaO) is primarily used as a drying agent for gases and organic liquids, and as a precursor in the synthesis of other barium compounds. It also finds application in catalysis and materials science.
What is the CAS number and chemical formula for Barium oxide?
+
The CAS number for Barium oxide is 1304-28-5, and its chemical formula is BaO.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Barium oxide in technical grade with an assay of 99.99% (trace metals basis). We do not represent this product as USP, BP, or EP grade.
How should Barium oxide be handled safely?
+
Barium oxide is corrosive and harmful if swallowed or inhaled. Handle with appropriate personal protective equipment, including eyeshields, gloves, and respiratory protection (type N100/P3). Avoid contact with skin and eyes, and ensure adequate ventilation.
Is Barium oxide a controlled substance?
+
Based on the provided data, Barium oxide is not listed as a controlled substance.
How is Barium oxide packed and shipped?
+
Barium oxide is shipped as UN 1884, Hazard Class 6.1, Packing Group III. It is typically supplied as powder and chunks.
How can I request a quote or sample?
+
Please contact Tech Serve Solutions directly through our website or sales channels to request a quote or sample of Barium oxide.
▶ Related products

Benzeneruthenium(II) chloride dimer
Ru2(C6H6)2Cl4
Catalysis & Inorganic
Benzoylferrocene
C17H14FeO
Catalysis & Inorganic
Benzyldiphenylphosphine
C6H5CH2P(C6H5)2
Catalysis & Inorganic
Beryllium
Be
Catalysis & Inorganic
Beryllium oxide
BeO
Catalysis & Inorganic![Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer — chemical structure, CAS 12257-42-0; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F12257-42-0.png&w=3840&q=75)
Bicyclo[2.2.1]hepta-2,5-diene-rhodium(I) chloride dimer
Catalysis & Inorganic
![Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo — chemical structure, CAS 1228149-03-8; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1228149-03-8.png&w=3840&q=75)
Bis[(10,11-η)-5-[(11bS)-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin-4-yl- κP4]-5H-dibenz[b,f]azepine]rhodium(I) tetrafluorobo
1-d:1′
Catalysis & Inorganic![Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride (C16H20ClN3Ni) — chemical structure, CAS 1033772-47-2; Catalysis & Inorganic, fine chemical supplied by Tech Serve Solutions](/_next/image?url=https%3A%2F%2Fpub-f4d920c906024441a773a96f7098e551.r2.dev%2Fimages%2Fproducts%2F1033772-47-2.png&w=3840&q=75)
Bis[(2-dimethylamino)phenyl]amine nickel(II) chloride
C16H20ClN3Ni
Catalysis & Inorganic▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis