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EPA TRI Chemical

2,4-Dinitrophenol

CAS Number: 51-28-5

Total releases
2.1M lbs
Number of facilities
10
Carcinogen
No
PBT substance
No
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According to the EPA Toxics Release Inventory, 2,4-Dinitrophenol (CAS 51-28-5) is disclosed by 10 Form R facilities totaling 2.1M lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.

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2,4-Dinitrophenol (CAS 51-28-5) 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 THE DOW CHEMICAL CO - BEAUMONT ANILINE in TX at 2.1M 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

2,4-Dinitrophenol: how the 2.1M lbs splits

2.1M lbs across all reported pathways

  • Land Disposal2.1M lbs100.0%
  • Air Releases150 lbs<0.1%
  • Off-site Transfers36 lbs<0.1%

2,4-Dinitrophenol's 2.1M lbs Form-R total is LAND, with land disposal making up 100.0% of the bar. Next segment: air releases at <0.1%.

Trend & Where It's Reported

Reported Release Trend

Between 2019 and 2023, cumulative annual 2,4-Dinitrophenol releases across all reporting facilities decreased by 72% (781.3K lbs → 221.1K lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.

Geographic Concentration

Reporting for 2,4-Dinitrophenol is highly concentrated: Texas accounts for 98.8% of the reported total (2 facilities). Next: Alabama.

  • Texas 2.1M lbs
  • Alabama 13.0K lbs
  • Arkansas 10.8K lbs
  • Kentucky 101 lbs
  • Missouri 38 lbs
Industry Sources

Reporting for 2,4-Dinitrophenol is highly concentrated by industry: Chemicals facilities account for 98.9% of the reported total (5 facilities). Next: Hazardous Waste.

  • Chemicals 2.1M lbs
  • Hazardous Waste 23.8K lbs
  • Nonmetallic Mineral Product 41 lbs

Which facilities release the most of this chemical?

Facilities with the largest reported releases of 2,4-Dinitrophenol. Up to 50 shown.

# Facility Release (lbs)
1 The Dow Chemical Co - Beaumont Aniline
2.1M lbs
2 Chemical Waste Management
13.0K lbs
3 Elemental Environmental Solutions LLC
10.8K lbs
4 Calgon Carbon Corp
101 lbs
5 Veolia Es Technical Solutions LLC Port Arthur Facility
41 lbs
6 Buzzi Unicem Usa-Cape Girardeau
38 lbs
7 First Chemical Corp
18 lbs
8 Heidelberg Materials US Cement LLC
3 lbs
9 Rubicon LLC
0 lbs
10 Basf Corp
0 lbs

Frequently Asked Questions

What is 2,4-Dinitrophenol in the EPA TRI? ▼
2,4-Dinitrophenol (CAS Number: 51-28-5) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. It is not marked as a carcinogen in the TRI classification set. 10 facilities in the United States report releasing this chemical to the EPA.
How much 2,4-Dinitrophenol is disclosed in U.S. TRI filings? ▼
U.S. facilities have reported a total of 2.1M lbs of 2,4-Dinitrophenol releases to the EPA Toxic Release Inventory across 10 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 2,4-Dinitrophenol? ▼
2,4-Dinitrophenol 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 2,4-Dinitrophenol? ▼
The Dow Chemical Co - Beaumont Aniline in TX reports the largest disclosed release of 2,4-Dinitrophenol in this dataset, at 2.1M 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 10 facilities on this page.
What is the CAS number for 2,4-Dinitrophenol? ▼
The CAS (Chemical Abstracts Service) Registry Number for 2,4-Dinitrophenol is 51-28-5. 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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How to Check Environmental Quality
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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.