INCI
Cosmetic ingredient

TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES

Tetramethyl acetyloctahydronaphthalenes is a mixture of four very closely related compounds. They are isomers: they contain the same basic elements but differ in how their atoms are arranged. The name on an ingredient list therefore identifies a group of related fragrance substances rather than one single, fixed molecule.

INCITE1 products
CAS number
54464-57-2/ 54464-59-4/ 68155-66-8/ 68155-67-9
EC number
259-174-3 / 259-175-9 / 268-978-3 / 268-979-9
Chemical name
Mixture of isomers: 1-(1,2,3,4,5,6,7,8-Octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one; 1-(1,2,3,4,5,6,7,8-Octahydro-2,3,5,5-tetramethyl-2-naphthyl)ethan-1-one; 1-(1,2,3,5,6,7,8,8a-Octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one (68155-67-9); 1-(1,2,3,4,6,7,8,8a-Octahydro-2,3,8,8-tetramethyl-2-naphthyl)ethan-1-one (68155-66-8)

TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES: what it is

Tetramethyl acetyloctahydronaphthalenes is a mixture of four very closely related compounds. They are isomers: they contain the same basic elements but differ in how their atoms are arranged. The name on an ingredient list therefore identifies a group of related fragrance substances rather than one single, fixed molecule.

The mixture is defined by four specific octahydronaphthalenone structures, not by the name of a plant, flower, or vegetable oil. That distinction is useful when reading a label: it identifies a fragrance material made from related chemical variants, rather than a botanical extract.

TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES: what it does in cosmetics

In cosmetics, Tetramethyl acetyloctahydronaphthalenes is part of the fragrance composition. In everyday terms, it contributes to the scent noticed when the product is applied; it is not an ingredient that, by itself, makes a cream moisturising or treats a skin condition.

It can also matter to people who want to identify fragrance ingredients on a label. European rules require this mixture to be named individually above set thresholds in leave-on and rinse-off products. That disclosure helps people recognise fragrance allergens, but it does not show that the mixture alone provides a skin-treatment benefit.

TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES: conditions and care

In the European Union, this mixture must be named individually in the ingredient list above 0.001% in leave-on products and 0.01% in rinse-off products.

Use limits

Restrictions and conditions of use

Cosmetic restriction
III/344
Catalogue presence

Products containing this ingredient

See which products include it and the name used in each composition.