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Dibenzofuran

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CAS Number: 132-64-9

Dibenzofuran (CAS 132-64-9) 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, 21 facilities have filed TRI Form R disclosures for Dibenzofuran, with a cumulative reported release volume of 124.9K lbs. The chemical is not flagged as a carcinogen in the TRI classification set. The largest individual disclosure in the current dataset comes from KOPPERS FOLLANSBEE TAR PLANT in WV at 77.9K 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.

Release Summary

Total Releases
124.9K lbs
Number of Facilities
21
Carcinogen
No
Persistent Bioaccumulative Toxicant
No

Which facilities release the most of this chemical?

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

# Facility Release (lbs)
1 Koppers Follansbee Tar Plant 77.9K lbs
2 Mountain State Carbon LLC 19.7K lbs
3 Sugar Cane Growers Cooperative of Florida 7.7K lbs
4 Ascend Performance Materials-Chocolate Bayou Plant 3.9K lbs
5 Flint Hills Resources Pine Bend LLC 3.8K lbs
6 Uss-Clairton Plant 3.4K lbs
7 Cleveland-Cliffs Burns Harbor LLC 3.1K lbs
8 Coopers Creek Chemical Corp 1.9K lbs
9 Cleveland-Cliffs Cleveland Works LLC DBA Cleveland-Cliffs Wa 1.5K lbs
10 Uss Gary Works 752 lbs
11 Arbor Preservative Systems LLC 483 lbs
12 Koppers Inc 355 lbs
13 Drummond Co Inc Abc Coke Div 234 lbs
14 Buzzi Unicem Usa-Cape Girardeau 128 lbs
15 Cleveland-Cliffs Monessen Coke LLC 105 lbs
16 Bluestone Coke 22 lbs
17 Arq Solutions (operations) LLC 13 lbs
18 Giant Cement Co 10 lbs
19 Heidelberg Materials US Cement LLC 5 lbs
20 Clean Harbors Deer Park LLC 1 lbs
21 Basin Electric Antelope Valley Station 0 lbs

Frequently Asked Questions

What is Dibenzofuran? ▼
Dibenzofuran (CAS Number: 132-64-9) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. 21 facilities in the United States report releasing this chemical to the EPA.
How much Dibenzofuran is released in the U.S.? ▼
U.S. facilities have reported a total of 124.9K lbs of Dibenzofuran releases to the EPA Toxic Release Inventory across 21 facilities. Release quantities are self-reported estimates. This includes releases to air, water, land, and off-site transfers.
Is Dibenzofuran harmful to health? ▼
Dibenzofuran is not classified as a carcinogen in the EPA TRI database. 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 Dibenzofuran? ▼
The largest reported releasers of Dibenzofuran include facilities across multiple states. Release data is self-reported annually to the EPA under the TRI program. View the full list of 21 facilities on this page.
What is the CAS number for Dibenzofuran? ▼
The CAS (Chemical Abstracts Service) Registry Number for Dibenzofuran is 132-64-9. 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 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.