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'''Polyhalogenated compounds''' (PHC's) are any compounds with multiple substitutions of halogens. They are of particular interest and importance because [[halogens]] generally are highly reactive and also [[bioaccumulate]] in humans, and comprise a superset of which has many toxic and carcinogenic industrial chemicals as members. [[PBDE]]'s, [[PCB]]'s, [[Polychlorinated dibenzodioxins|Dioxins]] and [[PFC]]'s are all polyhalogenated compounds. They are generally non-miscible in organic solvents or water, but miscible in some [[hydrocarbons]] from which they often derive.
==Uses==
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==Types==
* Polycholorinated, e.g. [[PCB]]'s, [[Polychlorinated dibenzodioxins|Dioxins]] (PCDD's), [[Hexachlorophene]], [[Dibenzofurans]] (PCDF's), [[Polychloro phenoxy phenol]]s (PCPP's), [[polychlorinated diphenyl ethers]] (PCDE's).
* Polybrominated, e.g., [[PBDE]]'s, [[polybrominated biphenyls]] (PBB's).
* [[Perflourinated compounds]]
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