Tris(2-hydroxyethyl)methylammonium hydroxide

CAS 33667-48-0

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

Molecular structure of 33667-48-0 — 1 OH⁻

US productionCBI

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

Import volumeZero

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 Zero
2019: US production Confidential · Imports Confidential

EPA-registered manufacturers (1)

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

Huntsman

Why It Matters

Sectors

Electronics

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

•pH regulating agent in Computer and Electronic Product Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS33667-48-0

PubChem CID118525

DTXSIDDTXSID8067785

FormulaC7H19NO4

Mol. Weight181.23 g/mol

SMILESC[N+](CCO)(CCO)CCO.[OH-]

Data Sources

EPA CompTox (DSSTox) · DTXSID8067785Retrieved 2026-04-06
PubChem · compound 118525Retrieved 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

Tris(2-hydroxyethyl)methylammonium hydroxide (CAS 33667-48-0) https://chemicalindependence.com/chemical/33667-48-0/ EPA CompTox (DSSTox): DTXSID8067785. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID8067785 PubChem: 118525. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/118525 EPA Chemical Data Reporting: 33667-48-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 33667-48-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting