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Mullite (Al6O5(SiO4)2)

CAS 1302-93-8

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

Molecular structure of 1302-93-8
US productionCBI
Top sourceNo public record

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

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential
EPA-registered manufacturers (2)
Minerals Technologies
O'Brien Industrial Holdings
Domestic parents -- activity not disclosed (1)
Palmer Holland

Why It Matters

Sectors
ElectronicsTransportationConstructionMetals & Mining
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 5 sectors as 2 functional roles.

  • •Hardener in Transportation Equipment ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Hardener in Primary Metal ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Hardener in Computer and Electronic Product ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Hardener in ConstructionProcessing—incorporation into formulation, mixture, or reaction product
  • •Hardener in Miscellaneous ManufacturingProcessing—incorporation into formulation, mixture, or reaction product
  • •Stabilizing agent in Primary Metal Manufacturing (100%)Processing—incorporation into article

Vendor Pricing

$0.09/gA2B Chem LLC (2 weeks)
CountryUnited States
Pack$220.00 / 2.5 kg
PurityNot recorded
Vendors6 available

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

5 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.11500 g—
AA BLOCKS (2 weeks)United States$0.111 kg—
Aaron Chemicals LLCHong Kong$0.11500 g—
Sigma-Aldrich (Rush Stock)Germany$0.86250 g—
Sigma-AldrichGermany$0.86250 g—

Chemical Identity

CAS1302-93-8
PubChem CID12880061
DTXSIDDTXSID3049675
FormulaAl6O13Si2
Mol. Weight426.05 g/mol
SMILESO=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Si]=O.O=[Si]=O

Data Sources

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Brief citations

Mullite (Al6O5(SiO4)2) (CAS 1302-93-8) https://chemicalindependence.com/chemical/1302-93-8/ EPA CompTox (DSSTox): DTXSID3049675. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3049675 PubChem: 12880061. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/12880061 EPA Chemical Data Reporting: 1302-93-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1302-93-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting