The present invention relates to a process for preparing tetrazole-substituted anthranilamide derivatives of the formula (I) in which R1, R2, R3, R4, R5 and Z are each as defined in the description, and to a novel crystal polymorph of these derivatives and to the use thereof in agrochemical formulations.本發明係關於一種用於製備式(I)之經四唑-取代的鄰胺基苯甲醯胺衍生物之方法,其中R1、R2、R3、R4、R5及Z各自如說明書中所定義,且關於該等衍生物之新穎結晶多形體及其於農用化學調配物中之用途。