Methomyl-d3

Methomyl-d₃ is intended for use as an internal standard for the quantification of methomyl by GC- or LC-MS. Methomyl is a carbamate insecticide and molluscicide.^1,2 It induces mortality of tobacco budworm larvae when applied at a concentration of 0.56 kg/ha and southern armyworm larvae at concentrations of 0.01 and 100 ppm.³ Methomyl is toxic to the land snail M. obstructa (LD₅₀ = 11.9 µg/snail).² It is also toxic to rats via oral but not dermal administration (LD₅₀s = 30 and >2,000 mg/kg, respectively).¹ Formulations containing methomyl have been used in the control of insects in agriculture.