engleski

Independent contact allergy to bisphenol F epoxy resin: A case report

Diglycidyl ether of bisphenol A epoxy resin (DGEBA-ER ; CAS no. 1675-54-3) is among the most prevalent occupational industrial contact allergens nowadays. Diglycidyl ether of bisphenol F epoxy resin (DGEBF-ER ; CAS no. 9003- 36-5) products are also widely used, but independent contact allergy to DGEBF-ER has been considered rare.A case of a 48-year-old male painter, with total work experience of 17 years, is presented. For the last 1.5 year he had been applying anticorrosive protection on oil tanks, which included sand blasting, washing with acetone, and spraying with two-component epoxy- based paint preheated at 30oC. After 5 months of performing these tasks, he developed eczema on his face, neck, hands and forearms, which tended to diminish during periods off work. Patch tests with the European baseline series were performed with negative results, including DGEBA-ER. Analysis of the safety data sheets revealed that the relevant paint contained >70% DGEBFER. Additional patch tests were performed in the worker and two control subjects with the relevant paint diluted 0.5% and 1% pet. The patient reacted positive, while no reaction was seen in both controls.Independent sensitization to DGEBF-ER should be evaluated in cases with typical exposure and clinical appearance, keeping in mind that a negative patch test with epoxy resin from European baseline series will mostly rule out only sensitization to DGEBA-ER.

CAS no. 9003-36-5, case report, diglycidyl ether of bisphenol F epoxy resin

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