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EPA TRI Chemical

O-Toluidine

CAS Number: 95-53-4

Total releases
44.8K lbs
Number of facilities
15
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, O-Toluidine (CAS 95-53-4) is disclosed by 15 Form R facilities totaling 44.8K 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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O-Toluidine (CAS 95-53-4) 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.

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 KETJEN PASADENA PLANT in TX at 17.4K 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

O-Toluidine: how the 44.8K lbs splits

44.8K lbs across all reported pathways

  • Air Releases28.0K lbs62.5%
  • Off-site Transfers15.6K lbs34.8%
  • Water Discharges983 lbs2.2%
  • Land Disposal237 lbs0.5%

O-Toluidine's 44.8K lbs Form-R total is MIXED, with air releases making up 62.5% of the bar. Next segment: off-site transfers at 34.8%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual O-Toluidine releases across all reporting facilities decreased by 8% (8.6K lbs → 8.0K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for O-Toluidine is concentrated: Texas accounts for 38.9% of the reported total (5 facilities). Next: New York.

  • Texas 17.4K lbs
  • New York 14.7K lbs
  • Michigan 7.7K lbs
  • Louisiana 4.5K lbs
  • Tennessee 340 lbs
Industry Sources

Reporting for O-Toluidine is highly concentrated by industry: Chemicals facilities account for 99.8% of the reported total (11 facilities). Next: Nonmetallic Mineral Product.

  • Chemicals 44.7K lbs
  • Nonmetallic Mineral Product 80 lbs
  • Hazardous Waste 20 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of O-Toluidine. Up to 50 shown.

# Facility Release (lbs)
1 Ketjen Pasadena Plant
17.4K lbs
2 Goodyear Tire & Rubber Co
15.9K lbs
3 Sun Chemical Corp Muskegon Plant
7.7K lbs
4 Basf Corp
4.0K lbs
5 Rubicon LLC
477 lbs
6 Eastman Chemical Co Tennessee Operations
340 lbs
7 Ac&s Inc
92 lbs
8 Norlite LLC
80 lbs
9 Veolia Es Technical Solutions LLC Port Arthur Facility
20 lbs
10 Covestro LLC
12 lbs
11 Clean Harbors Deer Park LLC
0 lbs
12 Clean Harbors Aragonite LLC
0 lbs
13 Dow Chemical Co Freeport Facility
0 lbs
14 Eco-Services Operations
0 lbs
15 Sunbelt Corp
0 lbs

Frequently Asked Questions

What is O-Toluidine in the EPA TRI? ▼
O-Toluidine (CAS Number: 95-53-4) 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. 15 facilities in the United States report releasing this chemical to the EPA.
How much O-Toluidine is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 44.8K lbs of O-Toluidine releases to the EPA Toxic Release Inventory across 15 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 O-Toluidine? ▼
O-Toluidine 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 O-Toluidine? ▼
Ketjen Pasadena Plant in TX reports the largest disclosed release of O-Toluidine in this dataset, at 17.4K 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 15 facilities on this page.
What is the CAS number for O-Toluidine? ▼
The CAS (Chemical Abstracts Service) Registry Number for O-Toluidine is 95-53-4. 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
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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.