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CAS 1982-69-0

Sodium dicamba

Sodium dicamba is the salt form of the herbicide dicamba, used to kill broadleaf weeds in crops, lawns, and along roads and rail lines. It acts like dicamba in the body and environment and can irritate eyes and skin; most public exposures are low [1][2].

Where It Comes From

Spraying on farms, turf, and rights‑of‑way; it moves with spray drift and runoff, and is mobile in soil, so it can reach surface and groundwater [1][2].

How You Are Exposed

Breathing spray or vapors near applications, skin contact with treated plants/soil, swallowing residues on food or in drinking water; highest exposures are in workers who mix, load, or apply it [1][2].

Why It Matters

Can cause eye/skin irritation and nausea/vomiting if swallowed; high‑dose animal studies show liver and body‑weight changes. EPA classifies dicamba as “not likely to be carcinogenic to humans” [1][2].

Who Is at Risk

Farmworkers and applicators; people living or working close to sprayed areas; children and pets on recently treated lawns; individuals with sensitive skin or respiratory conditions may be more reactive to irritants [1][3].

How to Lower Your Exposure

Follow posted notices and re‑entry intervals; stay away and close windows during/after spraying; wash produce; keep kids/pets off treated areas until dry; remove shoes at the door. Workers should use label‑required PPE and drift‑reduction practices [1][3].

References

  1. [1]U.S. EPA. Dicamba: Human Health Risk Assessment for Registration Review (2016).
  2. [2]U.S. EPA. Reregistration Eligibility Decision (RED) for Dicamba (2006).
  3. [3]U.S. EPA. Dicamba: Interim Registration Review Decision (2020).

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