Definitions for "Theoretical Yield"
(from www.gmp1st.com/drglos) . The quantity that would be produced at any appropriate phase of manufacture, processing, or packing of a particular drug product, based upon the quantity of components to be used, in the absence of any loss or error in actual production. [From ยง210.3(b)(17)
Theoretical yield is the maximum quantity of a product that could be formed in a chemical reaction if all the limiting reactant reacted to form products (distinguished from actual yield).
the amount of product that could form during a chemical reaction, calculated from a balanced chemical equation; it represents the maximum amount of product that could be formed from a given amount of reactant. (see yield, actual yield, percent yield)