106-50-3 is the key ingredient responsible for long-lasting, deep color. Its primary home is in , where it acts as a primary intermediate, bonding with color couplers to produce shades, particularly black and dark brown. It is favored for its ability to penetrate the hair shaft and provide wash-fast, vibrant results. Beyond hair, it is used in smaller quantities as a rubber antioxidant and in textile dyeing. The Dark Side of the Shade (Safety)
Essentially, 106-50-3 is the chemical that enables the permanence people want in hair color, while creating the skin reactions they fear. More detailed on PPD allergy symptoms? 106503
Here is the story of PPD, the invisible agent behind the color. The Invisible Artist (Usage) 106-50-3 is the key ingredient responsible for long-lasting,