EPA TRI Chemical
P-Phenylenediamine
CAS Number: 106-50-3
- Total releases
- 98.2K lbs
- Number of facilities
- 12
- Carcinogen
- No
- PBT substance
- No
According to the EPA Toxics Release Inventory, P-Phenylenediamine (CAS 106-50-3) is disclosed by 12 Form R facilities totaling 98.2K lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.
P-Phenylenediamine (CAS 106-50-3) 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 EQ DETROIT INC in MI at 55.0K 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.
MIXED pathway mix
P-Phenylenediamine: how the 98.2K lbs splits
98.2K lbs across all reported pathways
- Off-site Transfers60.0K lbs61.1%
- Air Releases37.4K lbs38.1%
- Land Disposal395 lbs0.4%
- Water Discharges375 lbs0.4%
P-Phenylenediamine's 98.2K lbs Form-R total is MIXED, with off-site transfers making up 61.1% of the bar. Next segment: air releases at 38.1%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual P-Phenylenediamine releases across all reporting facilities decreased by 67% (58.6K lbs → 19.2K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for P-Phenylenediamine is highly concentrated: Michigan accounts for 56.1% of the reported total (1 facility). Next: Indiana.
- Michigan 55.0K lbs
- Indiana 29.8K lbs
- Louisiana 7.4K lbs
- New York 5.4K lbs
- Ohio 433 lbs
Reporting for P-Phenylenediamine is highly concentrated by industry: Other facilities account for 56.1% of the reported total (1 facility). Next: Chemicals.
- Other 55.0K lbs
- Chemicals 43.0K lbs
- Hazardous Waste 101 lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of P-Phenylenediamine. Up to 50 shown.
Frequently Asked Questions
What is P-Phenylenediamine in the EPA TRI? ▼
How much P-Phenylenediamine is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify P-Phenylenediamine? ▼
Which facilities disclose the most P-Phenylenediamine? ▼
What is the CAS number for P-Phenylenediamine? ▼
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.