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EPA TRI Chemical

Perfluorohexanesulfonic Acid

CAS Number: 355-46-4

Total releases
4.0K lbs
Number of facilities
4
Carcinogen
No
PBT substance
No
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According to the EPA Toxics Release Inventory, Perfluorohexanesulfonic Acid (CAS 355-46-4) is disclosed by 4 Form R facilities totaling 4.0K lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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Perfluorohexanesulfonic Acid (CAS 355-46-4) 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 CHEMICAL WASTE MANAGEMENT in AL at 3.9K 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.

LAND pathway mix

Perfluorohexanesulfonic Acid: how the 4.0K lbs splits

4.0K lbs across all reported pathways

  • Land Disposal3.9K lbs97.0%
  • Off-site Transfers115 lbs2.9%
  • Water Discharges7 lbs0.2%

Perfluorohexanesulfonic Acid's 4.0K lbs Form-R total is LAND, with land disposal making up 97.0% of the bar. Next segment: off-site transfers at 2.9%.

Trend & Where It's Reported

Reported Release Trend

Between 2020 and 2023, cumulative annual Perfluorohexanesulfonic Acid releases across all reporting facilities decreased by 100% (123 lbs → 0 lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for Perfluorohexanesulfonic Acid is highly concentrated: Alabama accounts for 96.9% of the reported total (1 facility). Next: Minnesota.

  • Alabama 3.9K lbs
  • Minnesota 122 lbs
  • Texas 1 lbs
  • Illinois 0 lbs
Industry Sources

Reporting for Perfluorohexanesulfonic Acid is highly concentrated by industry: Hazardous Waste facilities account for 96.9% of the reported total (1 facility). Next: Chemicals.

  • Hazardous Waste 3.9K lbs
  • Chemicals 123 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Perfluorohexanesulfonic Acid. Up to 50 shown.

# Facility Release (lbs)
1 Chemical Waste Management
3.9K lbs
2 3M Chemical Operations' Cottage Grove Facility
122 lbs
3 Basf Corp - Freeport Site
1 lbs
4 3M Chemical Operations' Cordova Facility
0 lbs

Frequently Asked Questions

What is Perfluorohexanesulfonic Acid in the EPA TRI? ▼
Perfluorohexanesulfonic Acid (CAS Number: 355-46-4) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is not marked as a carcinogen in the TRI classification set. 4 facilities in the United States report releasing this chemical to the EPA.
How much Perfluorohexanesulfonic Acid is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 4.0K lbs of Perfluorohexanesulfonic Acid releases to the EPA Toxic Release Inventory across 4 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 Perfluorohexanesulfonic Acid? ▼
Perfluorohexanesulfonic Acid 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 Perfluorohexanesulfonic Acid? ▼
Chemical Waste Management in AL reports the largest disclosed release of Perfluorohexanesulfonic Acid in this dataset, at 3.9K 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 4 facilities on this page.
What is the CAS number for Perfluorohexanesulfonic Acid? ▼
The CAS (Chemical Abstracts Service) Registry Number for Perfluorohexanesulfonic Acid is 355-46-4. 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
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.

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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.