We report four cases of occupational allergic contact dermatitis due to the polyvinyl chloride gloves. They were 55-, 54-, 57- and 52-year old women who suffered from pruritic eruptions on their hands and forearms. They had used the polyvinyl chloride gloves to protect their hands during farm work, house cleaning, washing-up, weeding, etc. We performed 48-hour closed patch testing. All of them showed positive reactions to their gloves. In response to patch tests using the ingredients in the gloves, two of the four showed positive reactions to poly (adipic acid-co-1, 2-propylene glycol), used as plasticizer, and all of the four showed positive reactions to di-
n-octyltin-bis-(2-ethylhexyl) maleate, used as a stabilizer, and mono (2-ethylhexyl) maleate, a component of di-
n-octyltin-bis-(2-ethylhexyl) maleate. We conclude that 2-ethylhexyl maleate is the epitope of di-
n-octyltin-bis-(2-ethylhexyl) maleate.
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