Stability and determination of 1-(2-phenyl-2-cyclohexyl 1, 3-oxolan-4-methyl)-1-methyl piperidium iodide
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In the presence of alkali hydroxide, 1-(2-phenyl-2-cyclohexyl 1, 3-oxolan-4-methyl)-1-methyl piperidium iodide(I) reacted with potassium β-naphthoquinone sulfonate solution. The chloroform extract of the reaction product had an absorption maximum at 466 mμ and was stable for 24 hours. The relation between the absorbance at this wavelength and the concentration of (I) from 5μg/m<I>l</I> to 100μg/m<I>l</I> was linear and quantitative determination of (I) was possible. This substance in aqueous solution was very stable against heat at pH 3.5. Ultraviolet rays gave only slight decrease of absorbance when the concentration of (I) was greater than 0.2%.
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