WAldrin
WAzinphos-ethyl
WBinapacryl
WChlordane
WDemeton
WDieldrin
WDimefox
WEndrin
WFentin acetate
WHeptachlor
WKepone
WMercury(I) chloride
WMethoxychlor
WMirex
WOrganomercury
WOrganotin chemistry
WParathion
WPromecarb
WStockholm Convention on Persistent Organic Pollutants
WToxaphene
W2,4,5-Trichlorophenoxyacetic acid