p-Phenylenediamine, the allergen of the year? Why now? Granted, p-phenylenediamine (PPD) has been the leading permanent hair coloring agent or oxidative hair dye in most of the Western world since ...

such as N-isopropyl-N′-phenyl-p-phenylenediamine agents in the black rubber mix patch-test allergen. The latter are more likely to cause problems in the workplace but may also be used in garments.

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Also, the dye commonly utilised in hair colour, known as PPD (p-Phenylenediamine), is detrimental to hair health. Excessive use of such dyes may harm the overall health of the hair shaft. Using softer ...

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From henna to indigo, chamomile, coffee and beetroot, there are multiple natural options that you can use to colour your hair ...

An ingredient in the hair dye a French woman used caused her to develop a vision-robbing retinopathy, researchers report.

A 33-year-old Caucasian pregnant woman (26 weeks’ gestation) presented to the emergency department. She had a 2-day history of severe itching of the scalp and steadily worsening swelling of the face ...