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EPA TRI Chemical

Alpha-Naphthylamine

CAS Number: 134-32-7

Total releases
46 lbs
Number of facilities
2
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, Alpha-Naphthylamine (CAS 134-32-7) is disclosed by 2 Form R facilities totaling 46 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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Alpha-Naphthylamine (CAS 134-32-7) 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 HOLCIM (US) INC HOLLY HILL PLANT in SC at 27 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.

AIR pathway mix

Alpha-Naphthylamine: how the 46 lbs splits

46 lbs across all reported pathways

  • Air Releases46 lbs100.0%

Alpha-Naphthylamine's 46 lbs Form-R total is AIR, with air releases making up 100.0% of the bar. Off-site transfers stay separate from air, water, and land releases.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual Alpha-Naphthylamine releases across all reporting facilities increased by 7% (10 lbs → 11 lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Alpha-Naphthylamine is highly concentrated: South Carolina accounts for 59.0% of the reported total (1 facility). Next: Texas.

  • South Carolina 27 lbs
  • Texas 19 lbs
Industry Sources

Reporting for Alpha-Naphthylamine is highly concentrated by industry: Nonmetallic Mineral Product facilities account for 59.0% of the reported total (1 facility). Next: Hazardous Waste.

  • Nonmetallic Mineral Product 27 lbs
  • Hazardous Waste 19 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Alpha-Naphthylamine. Up to 50 shown.

# Facility Release (lbs)
1 Holcim (us) Inc Holly Hill Plant
27 lbs
2 Veolia Es Technical Solutions LLC Port Arthur Facility
19 lbs

Frequently Asked Questions

What is Alpha-Naphthylamine in the EPA TRI? ▼
Alpha-Naphthylamine (CAS Number: 134-32-7) 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. 2 facilities in the United States report releasing this chemical to the EPA.
How much Alpha-Naphthylamine is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 46 lbs of Alpha-Naphthylamine releases to the EPA Toxic Release Inventory across 2 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 Alpha-Naphthylamine? ▼
Alpha-Naphthylamine 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 Alpha-Naphthylamine? ▼
Holcim (us) Inc Holly Hill Plant in SC reports the largest disclosed release of Alpha-Naphthylamine in this dataset, at 27 lbs. Most reporting facilities for this chemical fall under nonmetallic mineral product. Release data is self-reported annually to the EPA under the TRI program. View the full list of 2 facilities on this page.
What is the CAS number for Alpha-Naphthylamine? ▼
The CAS (Chemical Abstracts Service) Registry Number for Alpha-Naphthylamine is 134-32-7. 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.

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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.