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Linalool Hydroperoxides

de Groot, Anton MD, PhD

doi: 10.1097/DER.0000000000000471
REVIEW
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Linalool is a fragrance widely used in cosmetics and household products. Until recently, contact allergy to linalool was considered rare because positive patch tests to it were infrequently observed. In recent years, however, it has been demonstrated that exposure of linalool to oxygen (air) results in formation of a number of oxidation products, of which the hydroperoxides have a far stronger sensitizing potency than the pure compound. By routine testing of patients suspected of having contact dermatitis with hydroperoxides of linalool, high frequencies of positive reactions were found, indicating these chemicals are important fragrance allergens. It should be realized, however, that a number of “positive” reactions may well be false-positive, irritant responses.

From Schipslootweg 5 8351 HV, Wapserveen, the Netherlands.

Address reprint requests to Anton de Groot, MD, PhD, Schipslootweg 5 8351 HV, Wapserveen, the Netherlands. E-mail: antondegroot@planet.nl.

The author has no funding or conflicts of interest to declare.

Anton de Groot is the author of the book Monographs in Contact Allergy, Volume II—Fragrances and Essential Oils. Boca Raton, FL: CRC Press Taylor & Francis Group; 2019, to which is referred repeatedly in this article.

© 2019 American Contact Dermatitis Society
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