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Hexachloro-1,3-Butadiene

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CAS Number: 87-68-3

Hexachloro-1,3-Butadiene (CAS 87-68-3) 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, 17 facilities have filed TRI Form R disclosures for Hexachloro-1,3-Butadiene, with a cumulative reported release volume of 12.0K lbs. The chemical is not flagged as a carcinogen in the TRI classification set. The largest individual disclosure in the current dataset comes from OCCIDENTAL CHEMICAL HOLDING CORP - GEISMAR PLANT in LA at 10.3K 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
12.0K lbs
Number of Facilities
17
Carcinogen
No
Persistent Bioaccumulative Toxicant
No

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Hexachloro-1,3-Butadiene. Up to 50 shown.

# Facility Release (lbs)
1 Occidental Chemical Holding Corp - Geismar Plant 10.3K lbs
2 Westlake US 2 LLC 892 lbs
3 Blue Cube Operations LLC - Plaquemine Site 352 lbs
4 Occidental Chemical Corp 217 lbs
5 Westlake Vinyls Inc 44 lbs
6 Clean Harbors Environmental Services Inc 43 lbs
7 Clean Harbors el Dorado LLC 43 lbs
8 Clean Harbors Deer Park LLC 41 lbs
9 Dow Chemical Co Freeport Facility 39 lbs
10 Freeport_olin Bc 17 lbs
11 Veolia Es Technical Solutions LLC Port Arthur Facility 16 lbs
12 Occidental Chemical Corp 2 lbs
13 Heritage Thermal Services 1 lbs
14 Clean Harbors Aragonite LLC 0 lbs
15 Arcwood Environmental - Orange LLC 0 lbs
16 Westlake Chemicals & Vinyls LLC 0 lbs
17 Heidelberg Materials US Cement LLC 0 lbs

Frequently Asked Questions

What is Hexachloro-1,3-Butadiene? ▼
Hexachloro-1,3-Butadiene (CAS Number: 87-68-3) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. 17 facilities in the United States report releasing this chemical to the EPA.
How much Hexachloro-1,3-Butadiene is released in the U.S.? ▼
U.S. facilities have reported a total of 12.0K lbs of Hexachloro-1,3-Butadiene releases to the EPA Toxic Release Inventory across 17 facilities. Release quantities are self-reported estimates. This includes releases to air, water, land, and off-site transfers.
Is Hexachloro-1,3-Butadiene harmful to health? ▼
Hexachloro-1,3-Butadiene 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 Hexachloro-1,3-Butadiene? ▼
The largest reported releasers of Hexachloro-1,3-Butadiene include facilities across multiple states. Release data is self-reported annually to the EPA under the TRI program. View the full list of 17 facilities on this page.
What is the CAS number for Hexachloro-1,3-Butadiene? ▼
The CAS (Chemical Abstracts Service) Registry Number for Hexachloro-1,3-Butadiene is 87-68-3. 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
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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.