<h1>Standard input-output norms ensure imported chemical inputs match declared ibuprofen export production requirements.</h1> Standard input-output norms set required material inputs and proportions for ibuprofen manufacture via the neopentyl glycol route, listing primary feedstocks (isobutyl benzene; propionic acid or 2-chloro propionic acid with thionyl chloride or 2-chloropionyl chloride; neopentyl glycol; and specified solvents) with input weights per unit output to determine allowable import quantities and requiring applicants to ensure imported goods match those used in the declared export product.