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Methyl Iodide

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CAS Number: 74-88-4

Methyl Iodide (CAS 74-88-4) 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, 10 facilities have filed TRI Form R disclosures for Methyl Iodide, with a cumulative reported release volume of 106.7K lbs. The chemical is not flagged as a carcinogen in the TRI classification set. The largest individual disclosure in the current dataset comes from EASTMAN CHEMICAL CO TENNESSEE OPERATIONS in TN at 54.9K 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
106.7K lbs
Number of Facilities
10
Carcinogen
No
Persistent Bioaccumulative Toxicant
No

Which facilities release the most of this chemical?

Facilities with the largest reported releases of Methyl Iodide. Up to 50 shown.

# Facility Release (lbs)
1 Eastman Chemical Co Tennessee Operations 54.9K lbs
2 Lyondellbasell Acetyls LLC 28.7K lbs
3 Deepwater Chemicals Inc. 16.9K lbs
4 Ingevity South Carolina LLC Charleston Chemical Plant 4.4K lbs
5 Celanese Ltd Clear Lake Plant 1.7K lbs
6 Iofina Chemical Inc. 75 lbs
7 Arkema Inc Clear Lake 16 lbs
8 Ineos Acetyls Chemicals Texas City 4 lbs
9 Heritage Thermal Services 0 lbs
10 Pharmacia & Upjohn Co LLC a Subsidiary of Pfizer Inc 0 lbs

Frequently Asked Questions

What is Methyl Iodide? ▼
Methyl Iodide (CAS Number: 74-88-4) is a chemical tracked by the EPA Toxic Release Inventory (TRI) program. 10 facilities in the United States report releasing this chemical to the EPA.
How much Methyl Iodide is released in the U.S.? ▼
U.S. facilities have reported a total of 106.7K lbs of Methyl Iodide releases to the EPA Toxic Release Inventory across 10 facilities. Release quantities are self-reported estimates. This includes releases to air, water, land, and off-site transfers.
Is Methyl Iodide harmful to health? ▼
Methyl Iodide 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 Methyl Iodide? ▼
The largest reported releasers of Methyl Iodide include facilities across multiple states. 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 Methyl Iodide? ▼
The CAS (Chemical Abstracts Service) Registry Number for Methyl Iodide is 74-88-4. 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
How the Toxic Release Inventory works
Biggest Polluters in America
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.