WRodenticide
WAluminium phosphide
WBromethalin
WCalcium phosphide
WChloralose
WCholecalciferol
WCopper(II) arsenate
WD-CON
WDifethialone
W1,3-Difluoro-2-propanol
W2,4-Dinitrophenol
WFlocoumafen
W2-Fluoroethanol
WFlupropadine
WAlpha-Naphthylthiourea
WNorbormide
WParis green
WPhenylsilatrane
WPhosacetim
WPindone
WPyrinuron
WScilliroside
WSodium fluoroacetate
WTetramethylenedisulfotetramine
WThallium(I) sulfate
WVitamin K antagonist
WZinc phosphide