2-Methyl-5-Hydroxyethylaminophenol
AKA “5-((2-Hydroxyethyl)amino)-2-methylphenol, 5-(2-hydroxyethylamino)-2-methylphenol, Phenol, CCRIS 3162, EINECS 259-583-7, 5-((2-Hydroxyethyl)amino)-o-cresol”
Synthetic
Ingredient Facts
2-Methyl-5-Hydroxyethylaminophenol
AKA: 5-((2-Hydroxyethyl)amino)-2-methylphenol, 5-(2-hydroxyethylamino)-2-methylphenol, CCRIS 3162, EINECS 259-583-7, 5-((2-Hydroxyethyl)amino)-o-cresol
Synthetic · Antioxidant · EWG: 6
Synthetic
Antioxidant
Synthetic
Clean
A hair color ingredient that helps create and stabilize permanent hair dye formulas, delivering rich, long-lasting color to strands.
Formula
C9H13NO2
Mol. Weight
167.20
CAS #
55302-96-0
See origin →
Functions
Hair Dyeing
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Colors Hair
Traditional Use
A synthetic hair dye intermediate developed in the 20th century as part of the modern permanent hair coloring industry. Designed to create brown and black hair color shades.
Skin Types
●all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Caution
Final Amended Report on the Safety Assessment of p-Methylaminophenol Sulfate and p-Methylaminophenol
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of 2-Amino-6-Chloro-4-Nitrophenol and 2-Amino-6-Chloro-4-Nitrophenol Hydrochloride
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of 2-Methyl-5-Hydroxyethylaminophenol
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of 2,4-Diaminophenol and 2,4-Diaminophenol Dihydrochloride
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of 6-Amino-m-Cresol, 6-Amino-o-Cresol, 4-Amino-m-Cresol, 5-Amino-4-Chloro-o-Cresol, 5-Amino-6-Chloro-o-Cresol and 4-Chloro-2-Aminophenol
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of Amino Nitrophenols Used in Hair Dyes
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of p-Aminophenol, m-Aminophenol, and o-Aminophenol
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of p-Methylaminophenol Sulfate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report on the Safety Assessment of Zinc Phenolsulfonate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report: Amended Safety Assessment of 4-Chloro-2-Aminophenol as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report: Safety Assessment of Sodium Benzotriazolyl Butylphenol Sulfonate as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Final Report: Safety Assessment of Tetrabromophenol Blue as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Zinc Phenolsulfonate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
2-Amino-5-Nitrophenol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
2-Amino-6-Chloro-4-Nitrophenol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
2-Methyl-5-Hydroxyethylaminophenol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
3-Nitro-p-Hydroxyethylaminophenol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
4-Amino-3-Nitrophenol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
4-Hydroxypropylamino-3-Nitrophenol
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Lingonberry (Vaccinium vitis-idaea L.) Fruit Phenolic Bio...
Pirjo Pärnänen, Sari Niikko, Hanna Lähteenmäki, Ismo T Räisänen, Taina Tervahartiala, Timo Sorsa + 1 more
Microorganisms, 2024
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR