Representativeness product of phosphate series. By changing the ratio of hydrophobic groups and ethylene oxide, ratio of monoester and diester, in order to achieve different wetting and dispersing properties(Monoesters improve electrolyte compatibility and compatibility with other products. Diester improves emulsion stability.) Phosphate esters are superior to nonionic ones in hydrophilicity and have better hydrophilicity after salt formation. Co-use with DYMOA/9 or DYEPE/10500 to formulate kinds of products such as Methoxyfenozide 200SC, Diuron 800SC, Terbuthylazine 500SC, Epoxiconazole 125SC