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CAS 23564-06-9

Thiophanate-ethyl

Thiophanate-ethyl is a fungicide used on crops and ornamentals to prevent mold and mildew. It breaks down into carbendazim, which has caused reproductive and developmental effects in animal studies, so limiting exposure matters [1][2].

Where It Comes From

Agricultural and greenhouse sprays; it can transform into carbendazim in soil, water, and living organisms [1][2].

How You Are Exposed

Mixing or spraying products; being near fields during/after application; touching treated plants/soil; eating residues on produce; drinking water affected by runoff or drift [1][2].

Why It Matters

Short-term contact can irritate skin/eyes; longer or higher exposures (via carbendazim) have affected fertility, development, and the liver in animals; it’s harmful to aquatic life [1][2].

Who Is at Risk

Farmworkers/applicators; pregnant people, infants, and children; residents near treated fields or greenhouse workers [2].

How to Lower Your Exposure

Follow labels and re-entry times; wear gloves, long sleeves, and respiratory protection if applying; avoid areas during spraying; wash/peel produce; keep work clothes/shoes separate; protect wells and prevent runoff [1][2].

References

  1. [1]WHO/FAO Joint Meeting on Pesticide Residues (JMPR). Thiophanate-ethyl evaluations: residues and toxicology. WHO/FAO JMPR Monographs.
  2. [2]U.S. EPA, Office of Pesticide Programs. Human Health Risk Assessment for Carbendazim and related benzimidazole fungicides (including thiophanate-ethyl metabolism to carbendazim).

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