PlainEnviro

EPA TRI Chemical

Diphenylamine

CAS Number: 122-39-4

Total releases
513.7K lbs
Number of facilities
43
Carcinogen
No
PBT substance
No
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According to the EPA Toxics Release Inventory, Diphenylamine (CAS 122-39-4) is disclosed by 43 Form R facilities totaling 513.7K lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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Diphenylamine (CAS 122-39-4) 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.

A carcinogen flag, when present on other chemicals in this database, reflects an assessment from EPA, IARC, or the National Toxicology Program rather than a TRI-specific determination. The largest individual disclosure in the current dataset comes from CYTEC INDUSTRIES INC in TN at 204.8K 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.

OFFSITE pathway mix

Diphenylamine: how the 513.7K lbs splits

513.7K lbs across all reported pathways

  • Off-site Transfers425.8K lbs82.9%
  • Air Releases68.8K lbs13.4%
  • Land Disposal18.6K lbs3.6%
  • Water Discharges453 lbs0.1%

Diphenylamine's 513.7K lbs Form-R total is OFFSITE, with off-site transfers making up 82.9% of the bar. Next segment: air releases at 13.4%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Diphenylamine releases across all reporting facilities decreased by 27% (133.4K lbs → 96.8K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Diphenylamine is concentrated: Tennessee accounts for 39.9% of the reported total (1 facility). Next: Texas.

  • Tennessee 204.8K lbs
  • Texas 180.4K lbs
  • Louisiana 70.6K lbs
  • Iowa 18.1K lbs
  • Georgia 11.6K lbs
Industry Sources

Reporting for Diphenylamine is highly concentrated by industry: Chemicals facilities account for 92.1% of the reported total (21 facilities). Next: Plastics and Rubber.

  • Chemicals 472.9K lbs
  • Plastics and Rubber 26.7K lbs
  • Other 11.6K lbs
  • Nonmetallic Mineral Product 2.1K lbs
  • Food 260 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Diphenylamine. Up to 50 shown.

# Facility Release (lbs)
1 Cytec Industries Inc
204.8K lbs
2 Lubrizol Corp Bayport Facility
179.7K lbs
3 Rubicon LLC
66.0K lbs
4 Parker Hannifin Corp. Inc.
18.1K lbs
5 US Army Fort Stewart (part)
11.6K lbs
6 Parker Hannifin Manhattan Facility
8.6K lbs
7 St. Marks Powder Inc.
5.3K lbs
8 First Chemical Corp
5.1K lbs
9 Goodyear Tire & Rubber Co
4.4K lbs
10 Chevron Oronite Co LLC - Oak Point Plant
4.3K lbs
11 Keystone Cement Co
2.1K lbs
12 Northrop Grumman Systems Corp (new River Energetics)
1.6K lbs
13 Pace International LLC
1.1K lbs
14 The Goodyear Tire & Rubber Co Bayport Chemical Plant
487 lbs
15 Dupont Pontchartrain Works
421 lbs
16 Mwc Michigan Llc.
260 lbs
17 Emerald Performance Materials LLC
243 lbs
18 Ebv Explosives Environmental Co
75 lbs
19 Afton Chemical Corp
75 lbs
20 Buzzi Unicem Usa-Cape Girardeau
53 lbs
21 Centauri Technologies LLC
45 lbs
22 Lnva-North Regional Treatment Plant
39 lbs
23 Veolia Es Technical Solutions LLC Port Arthur Facility
10 lbs
24 Clean Harbors Deer Park LLC
10 lbs
25 Exxonmobil Oil Beaumont Refinery (part)
3 lbs
26 Dow Chemical Co Freeport Facility
1 lbs
27 Clean Harbors el Dorado LLC
1 lbs
28 Ross Incineration Services Inc
0 lbs
29 U.S. Army Tooele Army Depot
0 lbs
30 Coast Southwest Inc
0 lbs
31 Decco US Postharvest Inc
0 lbs
32 U.S. Tooele Army Depot South
0 lbs
33 Federal Cartridge Co-Cci
0 lbs
34 Third Coast Terminals Pearland
0 lbs
35 Delta Deer Park
0 lbs
36 Covestro LLC
0 lbs
37 Blentech Corp
0 lbs
38 General Dynamics Ordnance & Tactical Systems Inc I Area
0 lbs
39 Continental Tire the Americas LLC
0 lbs
40 Basin Electric Antelope Valley Station
0 lbs
41 Inchem Corp
0 lbs
42 Orient Corp of America
0 lbs
43 US Army Picatinny Arsenal
0 lbs

Frequently Asked Questions

What is Diphenylamine in the EPA TRI? ▼
Diphenylamine (CAS Number: 122-39-4) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is not marked as a carcinogen in the TRI classification set. 43 facilities in the United States report releasing this chemical to the EPA.
How much Diphenylamine is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 513.7K lbs of Diphenylamine releases to the EPA Toxic Release Inventory across 43 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 Diphenylamine? ▼
Diphenylamine is not marked as a carcinogen in the TRI classification set. 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 Diphenylamine? ▼
Cytec Industries Inc in TN reports the largest disclosed release of Diphenylamine in this dataset, at 204.8K 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 43 facilities on this page.
What is the CAS number for Diphenylamine? ▼
The CAS (Chemical Abstracts Service) Registry Number for Diphenylamine is 122-39-4. 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

Understanding TRI Data
How the Toxic Release Inventory works
Biggest Polluters in America
Which facilities release the most toxics
How to Check Environmental Quality
Step-by-step guide to checking your local environment

Health Information

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.