Sepiolite

CAS 63800-37-3

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

Molecular structure of 63800-37-3 — 6 H₂O · 4 Mg²⁺ · 2 OH⁻

US productionCBI

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

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

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.

Munzing

EPA-registered importers (5)

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

Sika Ag · CH Switzerland

Ngk Ceramics Usa

Schlumberger

Sika

Tcr Industries

Why It Matters

Sectors

EnergyTransportationConstructionPaints & CoatingsCore 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 3 functional roles.

•Viscosity modifiers in Transportation Equipment Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
•Filler in Asphalt Paving, Roofing, and Coating Materials Manufacturing (80%)Processing—incorporation into article
•Thickening agent in Paint and Coating ManufacturingProcessing as a reactant

Chemical Identity

CAS63800-37-3

PubChem CID155804690

DTXSIDDTXSID2049767

FormulaH14Mg4O23Si6

Mol. Weight647.83 g/mol

SMILESO.O.O.O.O.O.[OH-].[OH-].[O-][Si](=O)O[Si](=O)[O-].[O-][Si](=O)O[Si](=O)[O-].[O-][Si](=O)O[Si](=O)[O-].[Mg+2].[Mg+2].[Mg+2].[Mg+2]

Data Sources

EPA CompTox (DSSTox) · DTXSID2049767Retrieved 2026-04-06
PubChem · compound 155804690Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04

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Brief citations

Sepiolite (CAS 63800-37-3) https://chemicalindependence.com/chemical/63800-37-3/ EPA CompTox (DSSTox): DTXSID2049767. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2049767 PubChem: 155804690. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/155804690 EPA Chemical Data Reporting: 63800-37-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 63800-37-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting