Organic liquids environmental variables

Aroclors possess properties different from their individual chlorobiphenyl compounds. For example, the individual compounds are solids at room temperature, whereas the Aroclors are either mobile oils (Aroclor 1221, 1232, 1242, and 1248), viscous liquids (Aroclor 1254), or sticky resins (Aroclor 1260 and 1262). PCBs are sparingly soluble in water, and the solubility decreases with increasing chlorine content (Table 9.5). Consequently, the aqueous solubilities of some Aroclors are also variable as follows 1242, 200 fig L 1248, 100 fig L 1254, 40 fig L and 1260, 25 figVK Bias in these results owing to selective solubilization of lower chlorinated biphenyls (LCBPs) should be taken into account in considering the environmental behavior of specific PCBs and their toxicity to organisms. The relative pattern of partitioning into tissues often reflects the differential water solubilities of the compounds rather than preferential uptake. 

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