PlainEnviro

EPA TRI Chemical

1,2-Butylene Oxide

CAS Number: 106-88-7

Total releases
11.1K lbs
Number of facilities
14
Carcinogen
Yes
PBT substance
No
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Carcinogen

According to the EPA Toxics Release Inventory, 1,2-Butylene Oxide (CAS 106-88-7) is disclosed by 14 Form R facilities totaling 11.1K 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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1,2-Butylene Oxide (CAS 106-88-7) 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 DOW CHEMICAL CO FREEPORT FACILITY in TX at 3.0K 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

1,2-Butylene Oxide: how the 11.1K lbs splits

11.1K lbs across all reported pathways

  • Air Releases10.3K lbs92.9%
  • Off-site Transfers783 lbs7.1%
  • Water Discharges8 lbs0.1%

1,2-Butylene Oxide's 11.1K lbs Form-R total is AIR, with air releases making up 92.9% of the bar. Next segment: off-site transfers at 7.1%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual 1,2-Butylene Oxide releases across all reporting facilities decreased by 25% (2.8K lbs → 2.1K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for 1,2-Butylene Oxide is concentrated: Texas accounts for 44.9% of the reported total (5 facilities). Next: Louisiana.

  • Texas 5.0K lbs
  • Louisiana 2.9K lbs
  • Illinois 2.3K lbs
  • California 443 lbs
  • Kentucky 268 lbs
Industry Sources

Reporting for 1,2-Butylene Oxide is highly concentrated by industry: Chemicals facilities account for 74.2% of the reported total (10 facilities). Next: Electric Utilities.

  • Chemicals 8.2K lbs
  • Electric Utilities 2.9K lbs
  • Nonmetallic Mineral Product 1 lbs
  • Hazardous Waste 0 lbs
  • Plastics and Rubber 0 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of 1,2-Butylene Oxide. Up to 50 shown.

# Facility Release (lbs)
1 Dow Chemical Co Freeport Facility
3.0K lbs
2 Westlake US 2 LLC
2.9K lbs
3 Enviro Tech International Inc.
2.3K lbs
4 Trecora Wax LLC
1.3K lbs
5 Huntsman Petrochemical LLC
650 lbs
6 Ips Corp
443 lbs
7 Louisville Packaging
268 lbs
8 Axalta Coating Systems USA Llc-Front Royal Plant
265 lbs
9 Lyondell Chemical Co
25 lbs
10 Freeport_olin Bc
7 lbs
11 Lacc LLC Us/lotte Chemical Louisiana LLC
1 lbs
12 Holcim (us) Inc Holly Hill Plant
1 lbs
13 Ross Incineration Services Inc
0 lbs
14 Elliott Co of Indianapoli S Inc.
0 lbs

Frequently Asked Questions

What is 1,2-Butylene Oxide in the EPA TRI? ▼
1,2-Butylene Oxide (CAS Number: 106-88-7) 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. 14 facilities in the United States report releasing this chemical to the EPA.
How much 1,2-Butylene Oxide is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 11.1K lbs of 1,2-Butylene Oxide releases to the EPA Toxic Release Inventory across 14 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 1,2-Butylene Oxide? ▼
1,2-Butylene Oxide 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 1,2-Butylene Oxide? ▼
Dow Chemical Co Freeport Facility in TX reports the largest disclosed release of 1,2-Butylene Oxide in this dataset, at 3.0K lbs. Most reporting facilities for this chemical fall under chemicals. Release data is self-reported annually to the EPA under the TRI program. View the full list of 14 facilities on this page.
What is the CAS number for 1,2-Butylene Oxide? ▼
The CAS (Chemical Abstracts Service) Registry Number for 1,2-Butylene Oxide is 106-88-7. 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.

Related Guides

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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.