Contact Allergen of the Year: p-Phenylenediamine

Vincent A. DeLeo


Dermatitis. 2006;17(2):53-55. 

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Aging Population

"Many graying baby boomers find themselves lingering in the hair dye aisles...wistfully eyeing boxes displaying the colors their hair once was."[13] Two of every five American women color their hair. The number of men who use this cosmetic procedure is unknown but has certainly grown within the last decade. In a recent Danish survey, almost 20% of the male respondents had used hair color.[14] In addition, many younger individuals, both men and women, decide to change the color of their hair. This is a huge market and a growing population of individuals exposed to all varieties of hair coloring agents, the majority of which contain PPD or cross-reacting substances ( Table 3 ).[2,12]


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