Barium oxide (BaO)

CAS 1304-28-5

U.S. production volumes are classified as confidential business information.

US productionCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Import value, 2024$20K

Top sourceCanada 100%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023.

Where It Comes From

Customs basis: HS 251120 · exact

EPA reports by year

2023: US production Confidential · Imports Confidential
2019: US production Confidential · Imports Confidential

Source Countries

Country of origin for US imports, from Census customs data (2024).

CA 100%Canada

EPA-registered manufacturers (5)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Basf Se · DE Germany

Clariant International · CH Switzerland

Basf

Clariant

Mcwane

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Honeywell International (123312)

EPA-registered importers (1)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Arkema

Why It Matters

Sectors

ConstructionCore Chemicals

Downstream UsesNot recorded

FDA Shortage Status

Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."

No FDA shortage records

Industrial Uses

Used in 3 sectors as 2 functional roles.

•Catalyst in All Other Basic Inorganic Chemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
•Catalyst in Petrochemical ManufacturingUse—non-incorporative activities
•Catalyst in All Other Basic Organic Chemical Manufacturing (100%)Use—non-incorporative activities
•Dehydrating agent (desiccant) in All Other Basic Organic Chemical Manufacturing (100%)Use—non-incorporative activities

Vendor Pricing

$0.76/gCombi-Blocks, Inc.

CountryUnited States

Pack$380.00 / 500 g

Purity95%

Vendors5 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

4 more vendors

Vendor	Country	$/g	Pack	Purity
AK Scientific Specialized	United States	$1.96	25 g	90%
AK Scientific, Inc.	United States	$2.76	25 g	95%
Sigma-Aldrich (Rush Stock)	Germany	$3.15	50 g	97%
Sigma-Aldrich	Germany	$3.15	50 g	97%

Chemical Identity

CAS1304-28-5

PubChem CID62392

DTXSIDDTXSID20893234

FormulaBaO

Mol. Weight153.33 g/mol

SMILESO=[Ba]

Data Sources

EPA CompTox (DSSTox) · DTXSID20893234Retrieved 2026-04-06
PubChem · compound 62392Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

Barium oxide (BaO) (CAS 1304-28-5) https://chemicalindependence.com/chemical/1304-28-5/ EPA CompTox (DSSTox): DTXSID20893234. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID20893234 PubChem: 62392. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/62392 EPA Chemical Data Reporting: 1304-28-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1304-28-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 251120 for CAS 1304-28-5. Reporting year: 2024. https://usatrade.census.gov/