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Sukakul, Thanisorn; Uter, Wolfgang; Gonçalo, Margarida; Huggard, Joseph; Ljubojević Hadžavdić, Suzana; Schuttelaar, Marie L. A.; Svedman, Cecilia; Vey, Matthias; Isaksson, Marléne; Niklasson, Bo; Rustemeyer, Thomas; Bruze, Magnus
Contact dermatitis, June 2024, 2024-Jun, 2024-06-00, 20240601, Letnik: 90, Številka: 6Journal Article
Background Quantitative risk assessment (QRA) for skin sensitization is used to derive safe use levels of sensitising fragrance ingredients in products. Post‐marketing surveillance of the prevalence of contact allergy to these ingredients provides relevant data to help evaluate the performance of these measures. Objectives To determine a suitable patch test concentration for five fragrance materials that had hitherto not been tested on a regular basis. These concentrations are then to be used in a surveillance study with patch testing consecutive patients over an extended monitoring period. Materials and Methods Furaneol, CAS.3658‐77‐3; trans‐2‐hexenal, CAS.6728‐26‐3; 4,8‐dimethyl‐4,9‐decadienal, CAS.71077‐31‐1; longifolene, CAS.475‐20‐7; benzaldehyde, CAS.10052‐7, were patch tested with other fragrance allergens in four clinics. Patch testing was conducted in three rounds, starting with the lowest concentrations of the five ingredients. The doses were increased in the subsequent rounds if no late‐appearing positive reactions and virtually no irritant reactions were reported. Results Overall, 373 patients were tested. No positive allergic reaction was reported to the five ingredients. Patch test results of other fragrance allergens are reported. Conclusions The highest test concentrations are each considered safe for patch testing consecutive patients. Further surveillance based on these preparations will evaluate the hypothesis that QRA‐driven consumer product levels of these fragrances can prevent sensitization. We report a suitable patch test concentration for five fragrance materials that are then to be used in a surveillance study with patch testing consecutive patients over an extended monitoring period to evaluate the hypothesis that the quantitative risk assessment‐driven consumer product levels of these fragrances can prevent sensitization.
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