Intermediates, pentachloropyridine, 3, 4, 5, 6- tetrachloropicolinonitrile, tetrachloro-terephthalodinitrile, 4-amino-3, 5-dichloro-2, 6-difluoropyridine, pentachlorobenzenitrile, flame retardants, 1, 2-bis(tetrabromophthalimide)ethane, 1, 2 bis (trbromophenoxy)-ethane, tribromophenol, 9, 10-dihydro-9-oxa-10-phosphenanthrene-10-oxide, agrochemical and crop protection products, picloram, clopyralid, pyrituticard, triclopyr, propachlor, acephate, tolclofos-methyl, isocarbophos.