IsocyanatesCyanatesPolyurethanesToluene 2,4-DiisocyanatePaintRhodiumAir Pollutants, OccupationalButylaminesTear GasesIndolizidinesOccupational ExposureAutomobilesInhalation ExposureMustard CompoundsEnvironmental MonitoringOccupational DiseasesAlveolitis, Extrinsic AllergicAlkynesChemical IndustryCyclization