PlainEnviro

EPA TRI Chemical

Toluene-2,4-Diisocyanate

CAS Number: 584-84-9

Total releases
91.9K lbs
Number of facilities
71
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, Toluene-2,4-Diisocyanate (CAS 584-84-9) is disclosed by 71 Form R facilities totaling 91.9K 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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Toluene-2,4-Diisocyanate (CAS 584-84-9) 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 US ECOLOGY TEXAS INC in TX at 12.6K 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.

MIXED pathway mix

Toluene-2,4-Diisocyanate: how the 91.9K lbs splits

91.9K lbs across all reported pathways

  • Off-site Transfers52.9K lbs57.6%
  • Air Releases22.4K lbs24.4%
  • Land Disposal16.5K lbs18.0%
  • Water Discharges5 lbs<0.1%

Toluene-2,4-Diisocyanate's 91.9K lbs Form-R total is MIXED, with off-site transfers making up 57.6% of the bar. Next segment: air releases at 24.4%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Toluene-2,4-Diisocyanate releases across all reporting facilities increased by 338% (4.3K lbs → 19.0K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Toluene-2,4-Diisocyanate is concentrated: Texas accounts for 25.3% of the reported total (7 facilities). Next: Ohio.

  • Texas 23.3K lbs
  • Ohio 19.1K lbs
  • Kentucky 11.0K lbs
  • Michigan 10.8K lbs
  • Massachusetts 9.1K lbs
Industry Sources

Reporting for Toluene-2,4-Diisocyanate is concentrated by industry: Plastics and Rubber facilities account for 27.7% of the reported total (16 facilities). Next: Hazardous Waste.

  • Plastics and Rubber 25.4K lbs
  • Hazardous Waste 23.7K lbs
  • Chemicals 19.5K lbs
  • Other 10.7K lbs
  • Chemical Wholesalers 9.5K lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Toluene-2,4-Diisocyanate. Up to 50 shown.

# Facility Release (lbs)
1 US Ecology Texas Inc
12.6K lbs
2 Carpenter Co.
11.0K lbs
3 Ross Incineration Services Inc
10.9K lbs
4 Eq Detroit Inc
10.7K lbs
5 Delta Baytown
9.5K lbs
6 Covestro LLC
9.1K lbs
7 Lear - Hebron Plant
7.9K lbs
8 Syngenta Crop Protection LLC Saint Gabriel Facility
4.3K lbs
9 Ppg Industriesinc-Springdale Complex
2.6K lbs
10 Woodbridge Inoac Technical Products LLC
2.0K lbs
11 Toyota Boshoku Mississippi LLC
2.0K lbs
12 Trelleborg Marine Systems N.a. Inc.
1.5K lbs
13 Third Coast Terminals Pearland
1.2K lbs
14 Fehrer Automotive N.a. LLC
1.2K lbs
15 Sika Mbcc US LLC
1.1K lbs
16 Woodbridge Corp
990 lbs
17 Elite Comfort Solutions LLC
787 lbs
18 Hyundai Transys Georgia Seating System Llc.
538 lbs
19 Macdermid Printing Solutions
389 lbs
20 Tri-Con Industries Ltd
358 lbs
21 Ppg Industries Ohio Inc Circleville Oh
336 lbs
22 Holcim Solutions & Products US LLC
250 lbs
23 Toyota Boshoku Indiana LLC
167 lbs
24 Clean Harbors el Dorado LLC
167 lbs
25 3M Co - Springfield
111 lbs
26 Armaly Sponge Co.
93 lbs
27 Clean Harbors Environmental Services Inc
75 lbs
28 Carpenter Co
74 lbs
29 True Temper Sports Inc
66 lbs
30 Coim USA Inc
50 lbs
31 Healthcare Sc LLC
48 lbs
32 Anderson Development Co
33 lbs
33 Veolia Es Technical Solutions LLC Port Arthur Facility
29 lbs
34 Beynon Sports Surfaces
20 lbs
35 Covestro LLC
20 lbs
36 Carlisle Polyurethane Systems
15 lbs
37 Urethane Systems USA LLC
10 lbs
38 Chestnut Ridge Foam Inc
10 lbs
39 Stockmeier Urethanes USA Inc
8 lbs
40 Jh Rhodes Co Inc
6 lbs
41 Allcoat Technology Inc
6 lbs
42 Premold Corp
5 lbs
43 Lear Corp Farwell Plant
5 lbs
44 Amfine Chemical Corp
4 lbs
45 3M Chemical Operations' Cottage Grove Facility
1 lbs
46 Clean Harbors Deer Park LLC
1 lbs
47 Axalta Coating Systems USA Llc-Mount Clemens Plant
1 lbs
48 Samos Polymers Corp
1 lbs
49 Covestro LLC
1 lbs
50 Eco-Services Operations
0 lbs

Frequently Asked Questions

What is Toluene-2,4-Diisocyanate in the EPA TRI? ▼
Toluene-2,4-Diisocyanate (CAS Number: 584-84-9) 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. 71 facilities in the United States report releasing this chemical to the EPA.
How much Toluene-2,4-Diisocyanate is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 91.9K lbs of Toluene-2,4-Diisocyanate releases to the EPA Toxic Release Inventory across 71 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 Toluene-2,4-Diisocyanate? ▼
Toluene-2,4-Diisocyanate 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 Toluene-2,4-Diisocyanate? ▼
US Ecology Texas Inc in TX reports the largest disclosed release of Toluene-2,4-Diisocyanate in this dataset, at 12.6K lbs. Most reporting facilities for this chemical fall under plastics and rubber. Release data is self-reported annually to the EPA under the TRI program. View the full list of 71 facilities on this page.
What is the CAS number for Toluene-2,4-Diisocyanate? ▼
The CAS (Chemical Abstracts Service) Registry Number for Toluene-2,4-Diisocyanate is 584-84-9. 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

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

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.