Irritant dermatitis from tri‐butyl tin oxide and contact allergy from chlorocresol

Abstract
A shipwright developed a delayed bullous irritant dermatitis from contact with a bis‐tri‐butyl tin oxide (TBTO) containing antifouling paint. He subsequently developed sensitization to 4‐chloro‐m‐cresol, a constituent of a steroid cream. No cross sensitivity lo 4‐ehloro‐3,5 xylenol was seen. Low concentrations of 4‐chloro‐m‐cresol in pet, may elicit a true positive reaction. TBTO is a strong irritant which will produce delayed bullous reactions in industrial use and on patch testing at 0.1% aqueous.

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