What is p-Phenylenediamine (PPD) used for?

PPD is primarily used as a permanent hair dye ingredient, especially for darker shades, due to its ability to create long-lasting and natural-looking color.

PPD can cause severe allergic reactions in some individuals, including skin irritation, swelling, and in rare cases, anaphylaxis. Patch testing before use is strongly recommended.

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p-Phenylenediamine

p-Phenylenediamine (PPD) is an organic compound primarily used as a dye intermediate in permanent hair dyes. It reacts with other chemicals to create long-lasting color. Due to its strong dyeing properties, it is highly effective for achieving dark and natural-looking hair colors.

NoneHair dyeVeganEvidence: High

BenefitNone 0 / 4

RiskSerious 4 / 4

Sensitization i4 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Irritation i3.5 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Systemic exposure i2.5 / 4

Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.

Rated by SpottyLabs' ingredient methodology, independent of brands.

Things to watch

Can cause severe allergic reactions, especially in sensitive individuals.
May lead to skin irritation, redness, and itching.
Potential for systemic exposure through skin absorption.

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Products with p-Phenylenediamine

I Love Riccio

Crema Colorante per Capelli senza Ammoniaca

3.3/ 56/10/11

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Frequently asked questions

What is p-Phenylenediamine (PPD) used for?: PPD is primarily used as a permanent hair dye ingredient, especially for darker shades, due to its ability to create long-lasting and natural-looking color.
Is PPD safe to use?: PPD can cause severe allergic reactions in some individuals, including skin irritation, swelling, and in rare cases, anaphylaxis. Patch testing before use is strongly recommended.