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O-Toluidine

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Carcinogen

CAS Number: 95-53-4

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.

Across the United States, 15 facilities have filed TRI Form R disclosures for O-Toluidine, with a cumulative reported release volume of 44.8K lbs. The chemical carries a carcinogen classification in the TRI database, based on assessments from EPA, IARC, or the National Toxicology Program. 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.

Release Summary

Total Releases
44.8K lbs
Number of Facilities
15
Carcinogen
Yes
Persistent Bioaccumulative Toxicant
No

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 14.6K 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? ▼
O-Toluidine (CAS Number: 95-53-4) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is classified as a known or suspected carcinogen. 15 facilities in the United States report releasing this chemical to the EPA.
How much O-Toluidine is released in the U.S.? ▼
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. This includes releases to air, water, land, and off-site transfers.
Is O-Toluidine harmful to health? ▼
O-Toluidine is classified as a known or suspected carcinogen by the EPA, based on evaluations from IARC, NTP, or EPA itself. Health effects depend on exposure levels, duration, and route. For specific health questions, consult a toxicologist or your local health agency.
Which facilities release the most O-Toluidine? ▼
The largest reported releasers of O-Toluidine include facilities across multiple states. 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

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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 Editorial

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.