Use of Euxyl K 400 as a preservative in skin care products is banned in Europe, but continues in the Unites States. Positive patch testing to Euxyl K 400 may occur in the setting of negative reactions to its components, methyldibromoglutaronitrile and phenoxyethanol.
From the Department of Dermatology, University of Texas Southwestern Medical Center, Dallas.
Address reprint requests to requests to Joshua L. Owen, BS, Department of Dermatology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, Dallas, TX 75390; E-mail: Joshua.Owen@UTSouthwestern.edu.
Dr Cruz is a consultant and receives speaking fees for Mary Kay and RCTS. He has current and pending grants from the National Institutes of Health and Department of Veterans Affairs. The remaining authors have no funding or conflicts to declare.