PlainEnviro

EPA TRI Chemical

4,4'-Methylenedianiline

CAS Number: 101-77-9

Total releases
1.0M lbs
Number of facilities
22
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, 4,4'-Methylenedianiline (CAS 101-77-9) is disclosed by 22 Form R facilities totaling 1.0M lbs of reported releases. The TRI extract marks this chemical with a carcinogen classification flag. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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4,4'-Methylenedianiline (CAS 101-77-9) is a chemical tracked by the EPA Toxics Release Inventory (TRI) program under Section 313 of the Emergency Planning and Community Right-to-Know Act. The TRI requires industrial facilities above specified threshold quantities to disclose annual manufacturing, processing, and otherwise-used volumes, along with quantities released to air, water, land, and off-site transfers.

The carcinogen flag above reflects an assessment from EPA, the International Agency for Research on Cancer, or the National Toxicology Program, not a TRI-specific determination. The largest individual disclosure in the current dataset comes from RUBICON LLC in LA at 862.0K lbs.

TRI volumes are self-reported estimates, not measured stack emissions, and each pound counts equally regardless of chemical toxicity, so total pounds should not be equated with total risk. Inclusion of a chemical or facility in the TRI does not itself establish a health hazard; it documents the public right-to-know record. Consult EPA's IRIS (Integrated Risk Information System) and the Agency for Toxic Substances and Disease Registry for health-effect summaries.

LAND pathway mix

4,4'-Methylenedianiline: how the 1.0M lbs splits

1.0M lbs across all reported pathways

  • Land Disposal861.0K lbs84.0%
  • Off-site Transfers119.9K lbs11.7%
  • Air Releases28.7K lbs2.8%
  • Water Discharges15.0K lbs1.5%

4,4'-Methylenedianiline's 1.0M lbs Form-R total is LAND, with land disposal making up 84.0% of the bar. Next segment: off-site transfers at 11.7%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual 4,4'-Methylenedianiline releases across all reporting facilities decreased by 55% (280.0K lbs → 127.0K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for 4,4'-Methylenedianiline is highly concentrated: Louisiana accounts for 85.0% of the reported total (2 facilities). Next: Texas.

  • Louisiana 870.5K lbs
  • Texas 88.5K lbs
  • California 22.1K lbs
  • Michigan 21.1K lbs
  • Washington 20.0K lbs
Industry Sources

Reporting for 4,4'-Methylenedianiline is highly concentrated by industry: Chemicals facilities account for 88.6% of the reported total (10 facilities). Next: Plastics and Rubber.

  • Chemicals 907.8K lbs
  • Plastics and Rubber 68.1K lbs
  • Other 21.1K lbs
  • Hazardous Waste 20.2K lbs
  • Machinery 7.5K lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of 4,4'-Methylenedianiline. Up to 50 shown.

# Facility Release (lbs)
1 Rubicon LLC
862.0K lbs
2 Future Pipe Industries
67.5K lbs
3 Evonik Corp
22.1K lbs
4 Eq Detroit Inc
21.1K lbs
5 Burlington Environmental LLC
20.0K lbs
6 Dow Chemical Co Freeport Facility
13.4K lbs
7 Basf Corp
8.5K lbs
8 Duoline Technologies Inc.
7.5K lbs
9 Solvay Specialty Polymers USA LLC
1.1K lbs
10 Huntsman Advanced Materials LLC
630 lbs
11 Solimide Foams
519 lbs
12 Clean Harbors Environmental Services Inc
115 lbs
13 Veolia Es Technical Solutions LLC Port Arthur Facility
78 lbs
14 Fiber Glass Systems
50 lbs
15 Covestro LLC
33 lbs
16 Evonik Corp
30 lbs
17 Clean Harbors Deer Park LLC
28 lbs
18 Nov Fiber Glass Systems-Burkburnett
15 lbs
19 Clean Harbors el Dorado LLC
6 lbs
20 Ross Incineration Services Inc
0 lbs
21 Elantas Pdg Inc
0 lbs
22 Urethane Systems USA LLC
0 lbs

Frequently Asked Questions

What is 4,4'-Methylenedianiline in the EPA TRI? ▼
4,4'-Methylenedianiline (CAS Number: 101-77-9) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. The TRI extract marks it with a carcinogen classification flag based on EPA/IARC/NTP listings. 22 facilities in the United States report releasing this chemical to the EPA.
How much 4,4'-Methylenedianiline is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 1.0M lbs of 4,4'-Methylenedianiline releases to the EPA Toxic Release Inventory across 22 facilities. Release quantities are self-reported estimates covering air, water, land, and off-site transfers. They are disclosure totals, not toxicity-weighted harm scores.
How does EPA TRI classify 4,4'-Methylenedianiline? ▼
4,4'-Methylenedianiline carries a carcinogen classification flag in the TRI database (drawn from EPA, IARC, or NTP listings). TRI classification flags document inventory listing status; they are not a site-specific exposure or health diagnosis. For health-effect summaries see EPA IRIS and ATSDR toxicological profiles.
Which facilities disclose the most 4,4'-Methylenedianiline? ▼
Rubicon LLC in LA reports the largest disclosed release of 4,4'-Methylenedianiline in this dataset, at 862.0K lbs. Most reporting facilities for this chemical fall under chemicals. Release data is self-reported annually to the EPA under the TRI program. View the full list of 22 facilities on this page.
What is the CAS number for 4,4'-Methylenedianiline? ▼
The CAS (Chemical Abstracts Service) Registry Number for 4,4'-Methylenedianiline is 101-77-9. CAS numbers are unique numerical identifiers assigned to every chemical substance described in the open scientific literature. This identifier is used to search scientific databases and regulatory filings.

Related Guides

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Health Information

Carcinogen Classification: This chemical is classified as a known or suspected carcinogen by the EPA under the Toxic Release Inventory program. This classification is based on evaluations by agencies including the International Agency for Research on Cancer (IARC), the National Toxicology Program (NTP), and the EPA itself.

Data comes from the EPA Toxic Release Inventory (TRI) program. Release quantities are self-reported by facilities and may represent estimates. The total shown aggregates reports across all facilities and reporting years.

PlainEnviro presents this data without advocacy framing. The presence of a chemical in the TRI database does not by itself indicate a health risk at current exposure levels. For health-related questions about specific chemical exposures, consult your local health agency or a toxicologist.

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Data sourced from the U.S. Environmental Protection Agency (EPA). See our methodology for details. Retrieved and formatted by PlainEnviro

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the EPA Toxic Release Inventory (TRI). Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.