- Type
- Hair dye intermediate
- How serious
- Moderate severity
- Evidence
- Strong evidence
Why it is flagged
One of the commonest causes of allergic contact dermatitis from hair dye; Health Canada does not permit it in products intended for use on the skin.
Health topics it bears on
Sources
- Cosmetic Ingredient Hotlist: Prohibited and restricted ingredients Health Canada, 2025
Also listed as
ppd, para phenylenediamine, paraphenylenediamine, 1 4 benzenediamine, p phenylenediamine sulfate, p phenylenediamine hcl, ci 76060