Para-Phenylenediamine

p-Phenylenediamine (PPD) is an organic compound with the formula C6H4(NH2)2. This derivative of aniline is a white solid, but samples can darken due to air oxidation. It is mainly used as a component of engineering polymers and composites like kevlar.

It is also an ingredient in hair dyes and is occasionally used as a substitute for henna.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

HENNAHAND

The art of mehndi — natural henna paste, patterns, and staining that lasts.

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