Toluene-2,5-Diamine
Toluene-2,5-Diamine is an organic compound primarily used as a hair dye ingredient. It is a precursor to many hair colorants, helping to create permanent and semi-permanent shades. This ingredient reacts with other chemicals to form the desired color within the hair shaft.
NoneHair dye intermediateVeganEvidence: High
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.
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
- Can cause allergic reactions
- Potential skin irritant
- May cause respiratory irritation
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Products with Toluene-2,5-Diamine
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Frequently asked questions
- What is Toluene-2,5-Diamine used for?
- Toluene-2,5-Diamine is a common ingredient in permanent and semi-permanent hair dyes, where it acts as a color precursor to create a wide range of shades.
- Is Toluene-2,5-Diamine safe?
- While effective for hair coloring, Toluene-2,5-Diamine is a known allergen and irritant. Patch testing before use is highly recommended to check for sensitivity.
Spotty Labs
