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EC number: 202-200-5 | CAS number: 92-88-6
Three individuals in the group of 311 subjects challenged with the 'rubber tray' showed a reaction to 4'4-dihydroxybiphenyl
The study was designed to examine the results of patch testing with the rubber components on a standard allergenicity screening tray with the results from a special tray containing a series of 27 rubber components ("rubber tray") including 4,4'-dihydroxybipheny. 1670 patients were patch tested using the standard screening tray and then 317 of the original cohort were tested with the rubber tray. A low frequency of reactions (1%) was seen in the cohort of 317 patients tested with 4,4'-dihydroxybiphenyl.
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