EPA TRI Chemical
Molybdenum Trioxide
CAS Number: 1313-27-5
- Total releases
- 11.0M lbs
- Number of facilities
- 222
- Carcinogen
- Yes
- PBT substance
- No
According to the EPA Toxics Release Inventory, Molybdenum Trioxide (CAS 1313-27-5) is disclosed by 222 Form R facilities totaling 11.0M 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.
Molybdenum Trioxide (CAS 1313-27-5) 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.
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 CHEMICAL WASTE MANAGEMENT - LA KE CHARLES FACILITY in LA at 1.6M 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.
MIXED pathway mix
Molybdenum Trioxide: how the 11.0M lbs splits
11.0M lbs across all reported pathways
- Off-site Transfers6.7M lbs60.7%
- Land Disposal3.8M lbs34.2%
- Air Releases383.4K lbs3.5%
- Water Discharges175.5K lbs1.6%
Molybdenum Trioxide's 11.0M lbs Form-R total is MIXED, with off-site transfers making up 60.7% of the bar. Next segment: land disposal at 34.2%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Molybdenum Trioxide releases across all reporting facilities decreased by 26% (2.5M lbs → 1.8M lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Molybdenum Trioxide is concentrated: Louisiana accounts for 36.0% of the reported total (27 facilities). Next: Texas.
- Louisiana 4.0M lbs
- Texas 2.6M lbs
- Indiana 873.3K lbs
- Oklahoma 751.2K lbs
- California 694.5K lbs
Reporting for Molybdenum Trioxide is highly concentrated by industry: Chemicals facilities account for 50.6% of the reported total (52 facilities). Next: Hazardous Waste.
- Chemicals 5.6M lbs
- Hazardous Waste 2.7M lbs
- Primary Metals 1.3M lbs
- Petroleum 1.2M lbs
- Electric Utilities 154.1K lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Molybdenum Trioxide. Up to 50 shown.
Frequently Asked Questions
What is Molybdenum Trioxide in the EPA TRI? ▼
How much Molybdenum Trioxide is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Molybdenum Trioxide? ▼
Which facilities disclose the most Molybdenum Trioxide? ▼
What is the CAS number for Molybdenum Trioxide? ▼
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.
Related
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.