Where It Comes From
Farm fields, nurseries, and greenhouses where soils are fumigated; it converts to MITC in soil, air, and water [1][2].
How You Are Exposed
Breathing MITC vapors or drift near applications; indoor air if fumes move into homes; skin/eye contact with treated soil/equipment; contaminated water after spills; food exposure is uncommon [1][2][3].
Why It Matters
Can cause burning eyes, sore throat, cough, wheeze, headache, nausea, and skin irritation; high levels can cause severe breathing problems and chemical burns; can trigger asthma‑like reactions [1][3].
Who Is at Risk
Applicators and fieldworkers; residents near treated fields; children, older adults, and people with asthma or lung disease [1][2].
How to Lower Your Exposure
Obey buffer zones and re‑entry times; during nearby fumigation stay indoors, close windows, use HVAC on recirculate; avoid treated soil; workers use required PPE; after spills, avoid the area and test wells [2][3].
References
- [1]ATSDR. ToxFAQs for Methyl Isothiocyanate (MITC). Agency for Toxic Substances and Disease Registry.
- [2]U.S. EPA. Metam Sodium and MITC: Reregistration Eligibility Decision (RED) and risk management documents (2008–2010).
- [3]CDC/NIOSH. Pocket Guide to Chemical Hazards: Methyl isothiocyanate.