N,N-BIS(2-HYDROXYETHYL)-p-PHENYLENEDIAMINE SULFATE
This ingredient is a type of aromatic amine used as a primary intermediate in permanent hair dyes. It reacts with other chemicals to form color molecules within the hair shaft, providing long-lasting color. It is typically used in oxidative hair coloring formulations.
NoneHair dye ingredientVeganEvidence: Medium
RiskHigh 2.8 / 4
Sensitization i3 / 4
Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.
Irritation i2.5 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Rated by SpottyLabs' ingredient methodology, independent of brands.
Things to watch
- Can cause allergic reactions in sensitive individuals
- May cause skin irritation
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Frequently asked questions
- What is N,N-BIS(2-HYDROXYETHYL)-p-PHENYLENEDIAMINE SULFATE used for?
- It is primarily used as a colorant in permanent hair dye formulations, contributing to the development of long-lasting hair color.
- Is N,N-BIS(2-HYDROXYETHYL)-p-PHENYLENEDIAMINE SULFATE safe?
- Like many hair dye ingredients, it can cause allergic reactions in some individuals, particularly those sensitive to PPD (p-phenylenediamine) derivatives. A patch test before use is recommended.
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