Calcium magnesium tetrahydroxide

CAS 39445-23-3

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

CaHMgO+₃81.4 g/mol

no molecular structure to draw

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

EPA-registered manufacturers (3)

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

Carmeuse Holding S A · LU Luxembourg

Carmeuse Lime

Lhoist North America

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.

Graymont

Why It Matters

Sectors

AgricultureWaterConstructionMetals & MiningPaper & PrintingCore 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 7 sectors as 11 functional roles.

•Intermediate in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing) (23%)Processing as a reactant
•Adhesion/cohesion promoter in ConstructionProcessing as a reactant
•pH regulating agent in UtilitiesProcessing as a reactant
•pH regulating agent in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing)Processing as a reactant
•Soil amendments (fertilizers) in Agriculture, Forestry, Fishing and HuntingProcessing as a reactant
•Dehydrating agent (desiccant) in All Other Chemical Product and Preparation ManufacturingProcessing as a reactant
•Stabilizing agent in ConstructionProcessing as a reactant
•pH regulating agent in Paper ManufacturingProcessing as a reactant
•Flux agent in Primary Metal ManufacturingProcessing as a reactant
•Dehydrating agent (desiccant) in Agriculture, Forestry, Fishing and HuntingProcessing as a reactant
•Adsorbent in All Other Chemical Product and Preparation ManufacturingProcessing as a reactant
•Sealant (barrier) in ConstructionProcessing as a reactant
•Defoamer in UtilitiesProcessing as a reactant
•Drier in Primary Metal ManufacturingProcessing as a reactant

Chemical Identity

CAS39445-23-3

PubChem CID170206

DTXSIDDTXSID3052068

FormulaCaHMgO+3

Mol. Weight81.39 g/mol

SMILES[OH-].[Mg+2].[Ca+2]

Data Sources

EPA CompTox (DSSTox) · DTXSID3052068Retrieved 2026-04-06
PubChem · compound 170206Retrieved 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

Calcium magnesium tetrahydroxide (CAS 39445-23-3) https://chemicalindependence.com/chemical/39445-23-3/ EPA CompTox (DSSTox): DTXSID3052068. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3052068 PubChem: 170206. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/170206 EPA Chemical Data Reporting: 39445-23-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 39445-23-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting