Ingredient
p-Phenylenediamine (PPD)
Scout's take
PPD is one of the most common causes of severe allergic contact dermatitis in cosmetic chemistry; the FDA, EU SCCS, and dermatology societies have repeatedly flagged it. Sensitization can be permanent and reactions can escalate from mild itching to severe facial swelling and life-threatening anaphylaxis with repeated use. It also undergoes oxidative reactions in the dye process that can generate additional reactive intermediates.
More from Scout's analyses
PPD is one of the most common causes of severe allergic contact dermatitis in cosmetic chemistry. Sensitization can be permanent and reactions can escalate from mild itching to severe facial swelling and life-threatening anaphylaxis with repeated use. It is the primary developer dye in most permanent oxidative formulas.
from the analysis of L'Oréal Paris Magic Root Permanent Dark BrownPPD is one of the most common causes of severe allergic contact dermatitis in cosmetic chemistry. Sensitization can be permanent and reactions can escalate from mild itching to severe facial swelling and life-threatening anaphylaxis with repeated use.
from the analysis of Dark & Lovely Jet BlackFound in 5 products
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