Is Nutrisse 3.23 Brun safe for sensitive scalps or people with known dye allergies?

The dye contains known irritants such as ammonium hydroxide, resorcinol, aromatic amines and fragrance allergens, so a patch test is essential; individuals with sensitivity to these ingredients should avoid use.

What function does resorcinol serve in the Nutrisse 3.23 Brun hair dye?

Resorcinol acts as a primary intermediate that reacts with hydrogen peroxide to form colored radicals, enabling the development of the brown pigment during the oxidation process.

How often should Nutrisse 3.23 Brun be applied, and does it contain any controversial chemicals?

It is intended for a single application per coloring session and should not be repeated on the same hair within a week; the product includes controversial ingredients such as ammonia, hydrogen peroxide, aromatic amines and nano-silica, which are common in professional hair-color formulations but can be a concern for some users.

L'OREAL NORGE AS

Nutrisse 3.23 Brun

Beauty

Product Insights

Nutrisse 3.23 Brun is a permanent hair-color product from L'Oreal that delivers a deep brown shade through an oxidative dye system. The formula combines ammonia (ammonium hydroxide) and hydrogen peroxide with color-developing agents such as resorcinol, m-aminophenol and 4-amino-2-hydroxy-toluene to create lasting pigment, while conditioning ingredients like cetearyl alcohol, dimethicone and rosemary extract help smooth and add shine to the hair. However, the presence of potential sensitizers such as ammonia, resorcinol, aromatic amines, fragrance compounds and nano-silica particles means it may trigger allergic reactions in sensitive users, and the product is not vegan due to animal-derived components.

Comparative Analysis

Marketed as L'Oreal's Nutrisse 3.23 Brun, this permanent brown dye stands out by pairing high-impact color chemistry with conditioning boosters such as dimethicone and rosemary extract, offering both vivid results and hair-care benefits that many standard dyes lack.

Ingredients

1206738 - AQUA / WATER , CETEARYL ALCOHOL , DECETH-3 , PROPYLENE GLYCOL , LAURETH-12 , AMMONIUM HYDROXIDE , OLETH-30 , LAURIC ACID , HEXADIMETHRINE CHLORIDE , GLYCOL DISTEARATE , TOLUENE-2,5-DIAMINE , ETHANOLAMINE , POLYQUATERNIUM-22 , SILICA DIMETHYL SILYLATE [NANO] / SILICA DIMETHYL SILYLATE , RESORCINOL , CI 77891 / TITANIUMDIOXIDE , m-AMINOPHENOL , p-AMINOPHENOL , 4-AMINO-2-HYDROXYTOLUENE , ASCORBIC ACID , TOCOPHEROL , SODIUMMETABISULFITE , 6-HYDROXYINDOLE , THIOGLYCERIN , HELIANTHUS ANNUUS SEED OIL / SUNFLOWER SEED OIL ,2-METHYLRESORCINOL , 2-METHYL-5-HYDROXYETHYLAMINOPHENOL , DIMETHICONE , CARBOMER , ROSMARINUS OFFICINALIS(ROSEMARY) EXTRACT , EDTA , VITIS VINIFERA SEED OIL / GRAPE SEED OIL , PARFUM / FRAGRANCE (F.I.L. C202804/1).1190018 - AQUA / WATER , HYDROGEN PEROXIDE , CETEARYL ALCOHOL , TRIDECETH-2 CARBOXAMIDE MEA, CETEARETH-25 , GLYCERIN , TETRASODIUM ETIDRONATE , TETRASODIUM PYROPHOSPHATE , SODIUM SALICYLATE , PHOSPHORIC ACID , PARFUM / FRAGRANCE F.I.L. C201679/1).1149755 A-AQUA / WATER , CETEARYL ALCOHOL , PARAFFINUM LIQUIDUM / MINERAL OIL , BEHENTRIMONIUM CHLORIDE , BUTYROSPERMUM PARKII BUTTER / SHEA BUTTER , OLEAEUROPAEA OIL / OLIVE FRUIT OIL , VACCINIUM MACROCARPON (CRANBERRY) SEED OIL , GLYCERIN , GLYCINE SOJA OIL / SOYBEAN OIL , RIBES NIGRUM SEED OIL / BLACKCURRANT SEED OIL , ISOPROPYL ALCOHOL , CITRIC ACID , PERSEA GRATISSIMA OIL /AVOCADO OIL , BHT , TOCOPHEROL , CHLORHEXIDINE DIGLUCONATE , CI 15985 /YELLOW 6 , CI 19140 / YELLOW 5 , LINALOOL , BUTYLPHENYL METHYLPROPIONAL , BENZYL ALCOHOL , PARFUM / FRAGRANCE (F.I.L. C207740/1).

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