Potassium What? EPA Frees Weird Pesticide Additive
Published Date: 3/20/2025
Rule
Summary
Starting March 20, 2025, potassium polyaspartate can be used safely in pesticide mixes without worrying about residue limits, thanks to a new EPA rule. This helps farmers, food makers, and pesticide companies by cutting red tape and speeding up product use. If anyone wants to challenge this, they have until May 19, 2025, to speak up.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
10% cap lets K‑polyaspartate be used without tolerances
Starting March 20, 2025, potassium polyaspartate (CASRN 64723-18-8) is exempt from the requirement of a tolerance when used as an inert complexing agent at a maximum of 10% in pre-harvest pesticide formulations. EPA will not register any pesticide formulation for food use that exceeds 10% potassium polyaspartate, and the 10% limit will be enforced through the pesticide registration process under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA).
EPA found no safety concerns for consumers
EPA concluded there are no toxicological endpoints of concern for potassium polyaspartate and determined, for aggregate exposure, "a reasonable certainty that no harm will result" to the general population including infants and children. Because no toxicological points of departure were identified, EPA did not apply additional safety factors for infants and children in its assessment.
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