Pesticide Registration Manual: Chapter 1 - Overview of Requirements for Pesticide Registration and Registrant Obligations | US EPA
Definitions: "Intent: ... The person who distributes or sells the substance claims, states, or implies (by labeling or otherwise):
--that the substance (either by itself or in combination with any other substance) can or should be used as a pesticide; or
that the substance consists of or contains an active ingredient and that it can be used to manufacture a pesticide; or the substance consists of or contains one or more active ingredients and has no significant commercially valuable use as distributed or sold other than (1) use for pesticidal purpose (by itself or in combination with any other substance), (2) use for manufacture of a pesticide; or the person who distributes or sells the substance has actual or constructive knowledge that the substance will be used, or is intended to be used, for pesticidal purpose." "Active ingredient (A.I.) – Any substance... that will prevent, destroy, repel or mitigate any pest" "Pests – This term means (1) any insect, rodent, nematode, fungus, weed, or (2) any other form of terrestrial or aquatic plant or animal life or virus, bacteria, or other micro-organism (except viruses, bacteria, or other micro-organisms on or in living man or other living animals) which the [Agency] declares to be a pest" "Where a product label directs the user to add a particular adjuvant before use, the registering division will treat that adjuvant as if it were an "other ingredient""