EPA TRI Chemical
Sodium Nitrite
CAS Number: 7632-00-0
- Total releases
- 35.8M lbs
- Number of facilities
- 519
- Carcinogen
- No
- PBT substance
- No
According to the EPA Toxics Release Inventory, Sodium Nitrite (CAS 7632-00-0) is disclosed by 519 Form R facilities totaling 35.8M lbs of reported releases. TRI pounds are self-reported disclosure totals, not a measured public-health risk score.
Sodium Nitrite (CAS 7632-00-0) 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 SABIC INNOVATIVE PLASTICS MT. VERNON LLC in IN at 7.2M 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
Sodium Nitrite: how the 35.8M lbs splits
35.8M lbs across all reported pathways
- Off-site Transfers17.8M lbs49.8%
- Water Discharges8.3M lbs23.1%
- Land Disposal8.2M lbs22.9%
- Air Releases1.5M lbs4.1%
Sodium Nitrite's 35.8M lbs Form-R total is MIXED, with off-site transfers making up 49.8% of the bar. Next segment: water discharges at 23.1%.
Trend & Where It's Reported
Between 2019 and 2023, cumulative annual Sodium Nitrite releases across all reporting facilities decreased by 21% (8.6M lbs → 6.8M lbs). Year-to-year swings reflect facility openings/closures and reporting changes as much as underlying activity.
Reporting for Sodium Nitrite is concentrated: Indiana accounts for 40.5% of the reported total (26 facilities). Next: Louisiana.
- Indiana 14.5M lbs
- Louisiana 6.2M lbs
- Wisconsin 2.0M lbs
- Georgia 1.8M lbs
- New York 1.7M lbs
Reporting for Sodium Nitrite is concentrated by industry: Chemicals facilities account for 46.0% of the reported total (188 facilities). Next: Primary Metals.
- Chemicals 16.5M lbs
- Primary Metals 7.4M lbs
- Fabricated Metals 4.2M lbs
- Transportation Equipment 2.4M lbs
- Hazardous Waste 1.5M lbs
Which facilities release the most of this chemical?
Facilities with the largest reported releases of Sodium Nitrite. Up to 50 shown.
Frequently Asked Questions
What is Sodium Nitrite in the EPA TRI? ▼
How much Sodium Nitrite is disclosed in U.S. TRI filings? ▼
How does EPA TRI classify Sodium Nitrite? ▼
Which facilities disclose the most Sodium Nitrite? ▼
What is the CAS number for Sodium Nitrite? ▼
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.
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.