"Feedstock" means any controlled substance or new substance that undergoes chemical transformation in a process in which it is entirely converted from its original composition and whose emissions are insignificant.

substance participating in a chemical reaction to form the products of the reaction, especially a directly reacting substance present at the initiation of the reaction

Substance capable of producing with another a reaction because of its chemical or biological activity, especially when employed to detect the presence of other bodies.

chemical reagent used to test for the presence of monosaccherides and reducing sugars