EPA TRI Chemical
Biphenyl
CAS Number: 92-52-4
- Total releases
- 980.6K lbs
- Number of facilities
- 159
- Carcinogen
- No
- PBT substance
- No
According to the EPA Toxics Release Inventory, Biphenyl (CAS 92-52-4) is disclosed by 159 Form R facilities totaling 980.6K lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.
Biphenyl (CAS 92-52-4) 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 ASCEND PERFORMANCE MATERIALS OPERATIONS LLC in FL at 200.0K 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
Biphenyl: how the 980.6K lbs splits
980.6K lbs across all reported pathways
- Air Releases513.4K lbs52.4%
- Land Disposal314.1K lbs32.0%
- Off-site Transfers152.1K lbs15.5%
- Water Discharges997 lbs0.1%
Biphenyl's 980.6K lbs Form-R total is MIXED, with air releases making up 52.4% of the bar. Next segment: land disposal at 32.0%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Biphenyl releases across all reporting facilities decreased by 6% (174.4K lbs → 163.3K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Biphenyl is dispersed: Florida accounts for 20.7% of the reported total (3 facilities). Next: South Carolina.
- Florida 202.9K lbs
- South Carolina 190.5K lbs
- Tennessee 161.5K lbs
- Texas 129.7K lbs
- Alabama 78.1K lbs
Reporting for Biphenyl is highly concentrated by industry: Chemicals facilities account for 79.2% of the reported total (59 facilities). Next: Hazardous Waste.
- Chemicals 776.2K lbs
- Hazardous Waste 117.3K lbs
- Petroleum 57.9K lbs
- Electric Utilities 13.4K lbs
- Textile Product 6.7K lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Biphenyl. Up to 50 shown.
Frequently Asked Questions
What is Biphenyl in the EPA TRI? ▼
How much Biphenyl is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Biphenyl? ▼
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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.