C₁₄H₂₄O₄NPS₃ An S-(O,O-diisopropyl phosphorodithioate) ester of N-(2-mercaptoethyl)-benzenesulfonamide; an amber liquid slightly soluble in water; melting point is 34.4_C; used as a preemergent herbicide for annual grasses and for broadleaf weeds in lawns and vegetable and cotton crops.