KY-S39 is an anionic dispersant containing both carboxylate and sulfonate produced by a special pesticide emulsifier and sodium sulfite under the high temperature & pressure chemical reaction. The simple SC formula can be used the KY-S39 individually. The complicated SC formula need to combine KY-S39 with polycarboxylate, naphthalenesulfonate, sodium ligninsulfonate, and block macromolecular polyether. This adjuvant can be widely applied in SC preparations.