A synthetic dye that helps create deep, long-lasting hair colors but may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
Beauty ingredient research
Browse the review database to understand what an ingredient is, what it does in a beauty formula, when it is useful, and when it deserves caution across skincare, haircare, bodycare, makeup, and more.
20769
Reviewed ingredients
524
Low-concern standouts
2884
Need usage caution
A synthetic dye that helps create deep, long-lasting hair colors but may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic yellow dye for hair color, generally considered safe in regulated concentrations but can cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic dye used in hair color that can cause irritation in sensitive individuals but is generally considered safe in regulated concentrations.
Irritation
moderate
Source
synthetic
A synthetic colorant used in hair dyes; generally safe when used as directed but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic violet dye for hair color, generally safe in rinse-off formulas but may cause irritation for sensitive scalps.
Irritation
moderate
Source
synthetic
A synthetic hair dye ingredient that helps create vibrant, lasting color but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
M-Aminophenol is a synthetic dye ingredient used in hair color to achieve cool, ashy tones, but it can be a skin irritant and allergen for some people.
Irritation
moderate
Source
synthetic
M-Aminophenol HCl is a synthetic dye ingredient used in permanent hair color to create cool, ashy shades, but it can be a skin irritant for some people.
Irritation
moderate
Source
synthetic
A synthetic hair dye intermediate that helps create long-lasting color but may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic hair dye intermediate that helps create long-lasting color but may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
Hair colorant
METHYLIMIDAZOLIUMPROPYL P-PHENYLENEDIAMINE HCL
A synthetic hair dye ingredient that can deliver deep color but carries a high risk of skin irritation and allergic reactions.
Irritation
high
Source
synthetic
A strong hair dye intermediate that can cause allergic reactions and skin irritation; not recommended for sensitive individuals.
Irritation
high
Source
synthetic
A common but potent hair dye ingredient that can cause allergic reactions in sensitive individuals.
Irritation
high
Source
synthetic
A common but potent hair dye ingredient that can cause allergic reactions and skin irritation; use with caution and always patch test.
Irritation
high
Source
synthetic
O-Aminophenol is a synthetic hair dye intermediate that helps create specific colors but may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic hair dye ingredient that creates warm shades but may cause skin irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
P-Aminophenol is a common hair dye ingredient that helps create natural-looking shades, but it can cause allergic reactions and irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
A synthetic hair dye ingredient that helps create long-lasting color but can cause skin irritation and allergic reactions in sensitive individuals.
Irritation
moderate
Source
synthetic
A powerful but potentially irritating hair dye ingredient that requires careful patch testing before use.
Irritation
high
Source
synthetic
A synthetic hair dye ingredient that helps color develop and last, but may cause irritation in sensitive individuals.
Irritation
moderate
Source
synthetic
Picramic acid is a synthetic dye used in hair color, but it has limited safety data and potential for skin irritation, making it a less common choice in modern formulations.
Irritation
moderate
Source
synthetic
Sodium Picramate is a synthetic dye used in hair color, but it can be a skin sensitizer and is best avoided by those with sensitive scalps.
Irritation
moderate
Source
synthetic
A common hair dye ingredient that delivers long-lasting color but can cause skin irritation and allergic reactions in sensitive individuals.
Irritation
moderate
Source
synthetic