carbaril

thumb|right|Spraying carbaryl on pine trees Carbaryl (1-naphthyl methylcarbamate) is an organic compound with the formula . Classified as a carbamate, it is used chiefly as an insecticide. It is a white solid was under the brand name Sevin, which was a trademark of the Bayer Company. ==Production== Carbaryl is often inexpensively produced by direct reaction of methyl isocyanate with 1-naphthol. C10H7OH + CH3NCO → C10H7OC(O)NHCH3

Alternatively, 1-naphthol can be treated with excess phosgene to produce 1-naphthylchloroformate, which is then converted to carbaryl by reaction with methylamine. The former process was used in the chemical plant that caused the Bhopal disaster. In comparison, the latter synthesis uses exactly the same reagents required for the synthesis of methyl isocyanate. This route avoids the potential hazards of methyl isocyanate, allbeit at a higher cost.