p-Phenylenediamine
INCI: P-PHENYLENEDIAMINE
Also known as: PPD, 1,4-Diaminobenzene
Key Facts
- CAS Number
- 106-50-3
- Category
- colorant
- Risk Level
- high
- Common Allergen
- Yes
- EU Status
- Restricted
- Max Concentration
- 2% (hair dye only)
- Found In
- hair dye, henna
What is p-Phenylenediamine?
Primary allergen in permanent hair dyes. One of the most potent contact allergens known.
Allergy & Safety Information
p-Phenylenediamine is classified as a high-risk ingredient. It is a known cause of allergic contact dermatitis. It is restricted or regulated in the EU. Individuals with sensitive skin or a history of contact allergies should avoid products containing this ingredient. A patch test is recommended before first use of any product containing p-Phenylenediamine.
Cross-Reactions
If you react to p-Phenylenediamine, you may also react to:
Safer Alternatives
These ingredients serve a similar function with lower allergy risk:
Frequently Asked Questions
Is p-Phenylenediamine safe for sensitive skin?
p-Phenylenediamine is a known allergen and is generally not recommended for sensitive skin. Consider patch testing before use.
What products contain p-Phenylenediamine?
p-Phenylenediamine is commonly found in hair dye, henna.
What does p-Phenylenediamine do in cosmetics?
p-Phenylenediamine functions as a colorant in formulations. Can cause severe allergic reactions including facial swelling. Cross-reacts with many chemicals.
Is p-Phenylenediamine causing YOUR skin reactions?
SkinDetekt tracks your products and reactions to find your personal triggers. Download the app to find out.
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