hexachlorobenzene (perchlorobenzene, hcb) banned fungicide molecule. persistent organic pollutant and probable human carcinogen

hexachlorobenzene hexa chloride chloro benzene aromatic perchlorobenzene fungicide chlorocarbon seed bunt fungal persistent organic pollutant pollution carcinogen banned cancer tumor carcinogenic hcb aquatic water hexachloride hydrogen carbon chlorine molecule atoms atomic model molecular