This standard specifies the technical methods for the determination of moisture in pesticides by the Karl Fischer method and the azeotropic distillation method. Applicable to the analysis of moisture in pesticide technical drugs and their processed formulations. The standard includes the specific operation steps of the Karl Fischer chemical Titrimetric method to determine the moisture content by dispersing the sample in methanol and titrating it with a standard Karl Fischer reagent of known water equivalents. The azeotropic distillation method is also included and is used for the separation and determination of moisture. The standard states that the experimenter must have experience in laboratory work and follow appropriate safety and health measures. The reagent should be analytically pure and be operated with distillation water.