ACTIVE SENSITIZATION AND OCCUPATIONAL ALLERGIC CONTACT-DERMATITIS CAUSED BY PARA-TERTIARY-BUTYLCATECHOL

Para-tertiary-butylcatechol (PTBC) is a rare allergen which is used is the rubber, paint and petroleum industries. mie present 9 patients wh o were sensitized to PTBC and examined at the Finnish Institute of Occ upational Health (FIOH) between 1974 and 1995. 3 of the patients had b een exposed to PTBC in their work. 2 of them also had allergic reactio ns to para-tertiary-butylphenol (PTBP)-formaldehyde resin and to PTBP. 5 of the patients became sensitized to PTBC from patch testing. PTBC tvas found to be one of the most common causes of active sensitization in our clinic. Accordingly, at the FIOH, the patch test concentration of PTBC was lowered to 0.25% and this lower concentration is recommen ded for general use.