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1304-28-5

Basic Information
CAS No.: 1304-28-5
Name: BARIUM OXIDE
Molecular Structure:
Molecular Structure of 1304-28-5 (BARIUM OXIDE)
Formula: BaO
Molecular Weight: 153.33
Synonyms: Bariumoxide (8CI);Baria;Barium monoxide;Barium oxide (Ba2O2);Barium oxide anhydrous;
EINECS: 215-127-9
Density: 5.72 g/cm3
Melting Point: 1923 °C
Boiling Point: ~2000 °C
Solubility: 3.48 g/100 mL (20 °C) in water
Appearance: white to cream powder
Hazard Symbols: ToxicT
Risk Codes: 20-25-34
Safety: 26-36/37/39-45
Transport Information: UN 1884 6.1/PG 3
PSA: 17.07000
LogP: -0.11880
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  • Barium oxide (BaO)

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    1304-28-5

    Barium oxide (BaO)

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Consensus Reports

Reported in EPA TSCA Inventory. Barium and its compounds are on the Community Right-To-Know List.

Standards and Recommendations

OSHA PEL: TWA 0.5 mg(Ba)/m3
ACGIH TLV: TWA 0.5 mg(Ba)/m3; Not Classifiable as a Human Carcinogen
DFG MAK: 0.5 mg(Ba)/m3
DOT Classification:  6.1; Label: KEEP AWAY FROM FOOD

Specification

The Barium oxide, with the CAS registry number 1304-28-5 and EINECS registry number 215-127-9, has the systematic name of oxobarium. And the molecular formula of this chemical is BaO. It is a kind of white to cream powder, and belongs to the following product categories: Industrial/Fine Chemicals; Inorganics; BariumEssential Chemicals; Adsorbents, Filter Aids and Drying Agents; Other Drying Agents; Barium; BariumMetal and Ceramic Science; Catalysis and Inorganic Chemistry; Chemical Synthesis; Oxides.

The physical properties of Barium oxide are as following: (1)#H bond acceptors: 1; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 17.07 Å2.

Preparation of Barium oxide: It can be prepared by heating barium carbonate with coke, carbon black or tar. And it may also be prepared by thermal decomposition of barium nitrate.

Uses of Barium oxide: It is used as a coating for hot cathodes. It is also used as an ethoxylation catalyst in the reaction of ethylene oxide and alcohols, which takes place between 150 and 200°C. What's more, it is used in the Glass and ceramics industries, and also used as dehydrating agent.

You should be cautious while dealing with this chemical. It is harmful by inhalation and toxic if swallowed. It may also cause burns. Therefore, you had better take the following instructions: Wear suitable protective clothing, gloves and eye/face protection, and in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice; In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).

You can still convert the following datas into molecular structure:
(1)SMILES: [Ba]=O
(2)InChI: InChI=1/Ba.O/rBaO/c1-2
(3)InChIKey: QVQLCTNNEUAWMS-FXUTYLCTAB

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 146mg/kg (146mg/kg)   Current Toxicology. Vol. 1, Pg. 39, 1993.
mouse LD50 subcutaneous 50mg/kg (50mg/kg)   Zhurnal Vsesoyuznogo Khimicheskogo Obshchestva im. D.I. Mendeleeva. Journal of the D.I. Mendeleeva All-Union Chemical Society. Vol. 19, Pg. 186, 1974.