Iodine principal characteristics

Iodobenzene [591-50-4], C6HBI, mol wt 204.02, 62.23% I, mp —30°C, bp 188—189°C, is a colodess liquid that rapidly becomes yellow and has a characteristic odor. It is insoluble in water, but completely miscible with alcohol, chloroform, and ether. It has a density of 1.832 g/mL at 20°C and a refractive index of 1.621 at 4°C. Iodobenzene is prepared by the reaction of iodine and benzene in the presence of an oxidizing agent and from benzeneiazonium sulfate and potassium iodide (122). Iodobenzene is used as a heavy liquid for refractive index determinations, but probably its principal use is in the synthesis of iodoso compounds, RIO iodoxy compounds, RI02 and iodonium salts, R IX. 

Because of insufficient experimental data, many Of the physical and biologic characteristics of must be based on observations of other iodine isotopes. For example, studies of short-term iodine behavior have utilized fallout radioiodine from nuclear explosions, principally in particulate form, and releases of elemental vapor forms of in field experiments or associated with nuclear power generation. However, little information is available concerning the changes in bioenvironmental concentration processes that might result from alterations in form and availability of in the long term. Analyses of behavior and potential accumulation of released to the environment must therefore be based on studies of 1 as a model for shortterm behavior, and stable iodine for long-term behavior. 

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