Carbaryl is often inexpensively produced by direct reaction of methyl isocyanate with 1-naphthol . 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 carried out in Bhopal . In comparison , the latter synthesis uses exactly the same reagents , but in a different sequence . This procedure avoids the potential hazards of methyl isocyanate
Bhopal
Bhopal disaster
Carbaryl