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Boron oxide (B2O3)

Drug ingredient

CAS 1303-86-2

This drug ingredient has classified U.S. production volumes. EPA withholds the number as confidential business information.

Molecular structure of 1303-86-2
US productionCBI
Import value, 2024$35M
Top sourceTurkey 76%

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. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 281000 · narrow

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 281000, which covers 2 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
TR 76%TurkeyIT 7%ItalyCL 6%ChilePE 3%PeruCN 2%China
EPA-registered manufacturers (2)
Basf Se · DE Germany
Basf
Domestic parents -- activity not disclosed (3)
Albemarle
Rio Tinto America
Target
EPA-registered importers (2)
American Borate
Haldor Topsoe

Why It Matters

Sectors
HealthEnergyElectronicsConstructionMetals & MiningCore Chemicals
Downstream Uses

Appears in 2 drug and cosmetic product listings (FDA).

  • •Boron Oxydatum
  • •Fire Retardant Chemical Detox 6041
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 5 sectors as 4 functional roles.

  • •Flux agent in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing) (40%)Processing as a reactant
  • •Catalyst in Petrochemical ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Catalyst in Petroleum Refineries (100%)Use—non-incorporative activities
  • •Flame retardant in ConstructionProcessing—incorporation into formulation, mixture, or reaction product
  • •Hardener in Primary Metal Manufacturing (20%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS1303-86-2
PubChem CID11073337
DTXSIDDTXSID7034387
FormulaB2O3
Mol. Weight69.63 g/mol
SMILESB12OB(O1)O2

Data Sources

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Brief citations

Boron oxide (B2O3) (CAS 1303-86-2) https://chemicalindependence.com/chemical/1303-86-2/ EPA CompTox (DSSTox): DTXSID7034387. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7034387 PubChem: 11073337. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/11073337 EPA Chemical Data Reporting: 1303-86-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1303-86-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 281000 for CAS 1303-86-2. Reporting year: 2024. https://usatrade.census.gov/