Kaligreen® Potassium Bicarbonate (CAS-298-14-6) Soluble Powder. The subject product, Kaligreen® Potassium Bicarbonate Soluble Powder, is a formulated contact-type fungicide based on microencapsulated potassium bicarbonate, an inorganic substance, as the active ingredient, together with surfactants and other application adjuvants. It is indicated for the control of powdery mildew for over forty crops.
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[1]. https://rulings.cbp.gov/ruling/N047470