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What You Need to Know about Para-Phenylenediamine (PPD)

This article serves as the introduction to a series on Para-phenylenediamine (PPD): its health risks, history, and politics. In the coming weeks, articles will be published which explore each section in greater detail.               Para-phenylenediamine, or a chemically related -diamine is an ingredient used in virtually all oxidative hair dyes, both store-bought and used in […]

ancientsunrisehenna
ancientsunrisehenna
September 12, 2017