PlainEnviro

EPA TRI Chemical

5-Nitro-O-Toluidine

CAS Number: 99-55-8

Total releases
253 lbs
Number of facilities
1
Carcinogen
No
PBT substance
No
Verify at EPA TRI →

According to the EPA Toxics Release Inventory, 5-Nitro-O-Toluidine (CAS 99-55-8) is disclosed by 1 Form R facility totaling 253 lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

View saved records

5-Nitro-O-Toluidine (CAS 99-55-8) 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 HERITAGE THERMAL SERVICES in OH at 253 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

5-Nitro-O-Toluidine: how the 253 lbs splits

253 lbs across all reported pathways

  • Off-site Transfers253 lbs100.0%
  • Air Releases0 lbs<0.1%

5-Nitro-O-Toluidine's 253 lbs Form-R total is OFFSITE, with off-site transfers making up 100.0% of the bar. Next segment: air releases at <0.1%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual 5-Nitro-O-Toluidine releases across all reporting facilities decreased by 100% (253 lbs → 0 lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for 5-Nitro-O-Toluidine is highly concentrated: Ohio accounts for 100.0% of the reported total (1 facility).

  • Ohio 253 lbs
Industry Sources

Reporting for 5-Nitro-O-Toluidine is highly concentrated by industry: Hazardous Waste facilities account for 100.0% of the reported total (1 facility).

  • Hazardous Waste 253 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of 5-Nitro-O-Toluidine. Up to 50 shown.

# Facility Release (lbs)
1 Heritage Thermal Services
253 lbs

Frequently Asked Questions

What is 5-Nitro-O-Toluidine in the EPA TRI? ▼
5-Nitro-O-Toluidine (CAS Number: 99-55-8) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is not marked as a carcinogen in the TRI classification set. 1 facilities in the United States report releasing this chemical to the EPA.
How much 5-Nitro-O-Toluidine is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 253 lbs of 5-Nitro-O-Toluidine releases to the EPA Toxic Release Inventory across 1 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 5-Nitro-O-Toluidine? ▼
5-Nitro-O-Toluidine is not marked as a carcinogen in the TRI classification set. 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 5-Nitro-O-Toluidine? ▼
Heritage Thermal Services in OH reports the largest disclosed release of 5-Nitro-O-Toluidine in this dataset, at 253 lbs. Most reporting facilities for this chemical fall under hazardous waste. Release data is self-reported annually to the EPA under the TRI program. View the full list of 1 facilities on this page.
What is the CAS number for 5-Nitro-O-Toluidine? ▼
The CAS (Chemical Abstracts Service) Registry Number for 5-Nitro-O-Toluidine is 99-55-8. 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
How the Toxic Release Inventory works
Biggest Polluters in America
Which facilities release the most toxics
How to Check Environmental Quality
Step-by-step guide to checking your local environment

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

Browse all → | Rankings →
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.