EPA TRI Chemical
Diisocyanates
EPA TRI Category Code: N120
- Total releases
- 17.7M lbs
- Number of facilities
- 1,748
- Carcinogen
- No
- PBT substance
- No
According to the EPA Toxics Release Inventory, Diisocyanates (EPA TRI Category Code N120) is disclosed by 1,748 Form R facilities totaling 17.7M lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.
Diisocyanates (EPA TRI Category Code N120) 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 GAF KEYSTONE LLC/NEW COLUMBIA FACILITY in PA at 1.8M 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
Diisocyanates: how the 17.7M lbs splits
17.7M lbs across all reported pathways
- Off-site Transfers13.4M lbs75.8%
- Land Disposal2.7M lbs15.3%
- Air Releases1.6M lbs8.9%
- Water Discharges67 lbs<0.1%
Diisocyanates's 17.7M lbs Form-R total is OFFSITE, with off-site transfers making up 75.8% of the bar. Next segment: land disposal at 15.3%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Diisocyanates releases across all reporting facilities increased by 108% (2.2M lbs → 4.5M lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Diisocyanates is dispersed: Pennsylvania accounts for 15.9% of the reported total (89 facilities). Next: Texas.
- Pennsylvania 2.8M lbs
- Texas 1.7M lbs
- Tennessee 1.3M lbs
- Indiana 997.6K lbs
- Louisiana 850.6K lbs
Reporting for Diisocyanates is concentrated by industry: Chemicals facilities account for 31.7% of the reported total (275 facilities). Next: Hazardous Waste.
- Chemicals 5.6M lbs
- Hazardous Waste 4.7M lbs
- Plastics and Rubber 3.7M lbs
- Transportation Equipment 1.7M lbs
- Fabricated Metals 461.9K lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Diisocyanates. Up to 50 shown.
Frequently Asked Questions
What is Diisocyanates in the EPA TRI? ▼
How much Diisocyanates is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Diisocyanates? ▼
Which facilities disclose the most Diisocyanates? ▼
Why is Diisocyanates listed under code N120 instead of a CAS number? ▼
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.
Related
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.