2,4-Diaminophenoxyethanol HCl
2,4-Diaminophenoxyethanol HCl is a synthetic organic compound used as a primary intermediate in permanent hair dye formulations. It contributes to the formation of various hair color shades, particularly in brown and black tones, by reacting with couplers and oxidizers. It is not used for its own color but as a key component in the chemical dyeing process.
NoneHair dye intermediateVeganEvidence: Medium
RiskHigh 2.8 / 4
Sensitization i2.8 / 4
Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.
Irritation i2 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Systemic exposure i1 / 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
- potential skin sensitizer
- may cause allergic reactions
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Frequently asked questions
- What is 2,4-Diaminophenoxyethanol HCl used for in hair dye?
- This ingredient is a primary intermediate in permanent hair dyes, reacting with other chemicals to develop the final hair color, often contributing to brown and black shades.
- Is 2,4-Diaminophenoxyethanol HCl safe for hair coloring?
- While regulated for use in hair dyes, it is a known sensitizer and can cause allergic reactions in some individuals, making patch testing essential before application.
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