4,4'-Diaminobiphenyl methane

CAS 101-77-9

EPA’s 2023 records show zero U.S. production of this chemical.

US productionZero

Import value, 2024$84M

Import volumeCBI

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

Top sourceJapan 31%

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. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292159 · basket

EPA reports by year

2023: US production Zero · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 292159, which covers 51 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

JP 31%JapanIN 26%IndiaCN 21%ChinaCH 13%SwitzerlandBE 4%Belgium

United Kingdom
South Korea
Canada
Italy
Ukraine
Netherlands

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.

Lanxess

EPA-registered importers (3)

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

Aceto Us

Elantas Pdg

Huntsman

Why It Matters

Sectors

ConstructionPlastics & RubberCore 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 2 sectors as 2 functional roles.

•Surface modifier in All Other Chemical Product and Preparation Manufacturing (100%)Processing as a reactant
•Intermediate in Adhesive Manufacturing (30%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS101-77-9

PubChem CID7577

DTXSIDDTXSID6022422

FormulaC13H14N2

Mol. Weight198.26 g/mol

SMILESC1=CC(=CC=C1CC2=CC=C(C=C2)N)N

Data Sources

EPA CompTox (DSSTox) · DTXSID6022422Retrieved 2026-04-06
PubChem · compound 7577Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

4,4'-Diaminobiphenyl methane (CAS 101-77-9) https://chemicalindependence.com/chemical/101-77-9/ EPA CompTox (DSSTox): DTXSID6022422. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6022422 PubChem: 7577. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/7577 EPA Chemical Data Reporting: 101-77-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 101-77-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292159 for CAS 101-77-9. Reporting year: 2024. https://usatrade.census.gov/