Tris(4,4'-diaminodiphenylmethane)sodium chloride

CAS 21646-20-8

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

Molecular structure of 21646-20-8 — 1 Cl⁻ · 1 Na⁺

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 Zero

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.

Lanxess

Why It Matters

Sectors

TransportationPaper & Printing

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 2 sectors as 1 functional role.

•Hardener in Transportation Equipment Manufacturing (70%)Processing as a reactant
•Hardener in Printing and Related Support Activities (30%)Processing as a reactant

Chemical Identity

CAS21646-20-8

PubChem CID23692754

DTXSIDDTXSID80893492

FormulaC39H42ClN6Na

Mol. Weight653.2 g/mol

SMILESC1=CC(=CC=C1CC2=CC=C(C=C2)N)N.C1=CC(=CC=C1CC2=CC=C(C=C2)N)N.C1=CC(=CC=C1CC2=CC=C(C=C2)N)N.[Na+].[Cl-]

Data Sources

EPA CompTox (DSSTox) · DTXSID80893492Retrieved 2026-04-06
PubChem · compound 23692754Retrieved 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(4,4'-diaminodiphenylmethane)sodium chloride (CAS 21646-20-8) https://chemicalindependence.com/chemical/21646-20-8/ EPA CompTox (DSSTox): DTXSID80893492. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID80893492 PubChem: 23692754. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/23692754 EPA Chemical Data Reporting: 21646-20-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 21646-20-8. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting