Functional Category 200 ingredients

Fragrance Ingredients in Cosmetics

Fragrance ingredients span essential oils (natural plant extracts) and aroma chemicals (synthetic molecules). Under EU Regulation 1223/2009 Annex III, a defined list of fragrance allergens must be declared on cosmetic product labels when present above the leave-on and rinse-off declaration thresholds — and the list is expanding substantially under Regulation (EU) 2023/1545, bringing dozens of additional materials into scope during the 2026-2028 transition window. The International Fragrance Association (IFRA) also issues category-specific concentration limits through its voluntary standards program. This hub lists fragrance ingredients with their IFRA restriction status where applicable, EU allergen declaration context, sensitization assay data, and cross-jurisdictional regulatory references.

Functional Categories
Skin Conditioning Ingredients Humectants in Cosmetics Emollient Ingredients in Cosmetics Antioxidants in Cosmetics Surfactants in Cosmetics Emulsifiers in Cosmetics Fragrance Ingredients in Cosmetics Cosmetic Colorants Cosmetic Preservatives UV Filters & Sunscreen Ingredients Hair Conditioning Ingredients Rheology Modifiers & Thickeners Active Cosmetic Ingredients Plant Extracts & Botanical Ingredients
Regulatory Clusters
Cosmetic Ingredients Flagged as Endocrine Disruptors Cosmetic Ingredients Listed Under California Proposition 65 Cosmetic Ingredients with SCCS Safety Opinions Cosmetic Ingredients with CIR Expert Panel Conclusions Cosmetic Ingredients with GHS Hazard Classification Cosmetic Ingredients with NOAEL Toxicological Data Cosmetic Ingredients Banned or Restricted Globally Cosmetic Ingredients with Sensitization Data Cosmetic Ingredients with Dermal Absorption Data Cosmetic Ingredients Restricted Under EU Regulation 1223/2009
Browse A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #
Ingredient Safety
1,1-Dimethyl-2-Phenylethyl Isobutyrate GOOD
1,1-Dimethyl-3-Phenylpropyl Isobutyrate GOOD
1,2,3,4,4a,5,6,7-Octahydro-2,5,5-Trimethyl-2-Naphthol MODERATE
1,2,3,4,4a,7,8,8a-Octahydro-2,4a,5,8a-Tetramethyl-Naphthyl Formate MODERATE
1,2-Dihydrolinalool GOOD
1,3-Dimethyl-3-Phenylbutyl Acetate GOOD
1,3-Dimethyl-Bicycloheptane-2-Carbonitrile GOOD
1,5,9-Trimethyl-Oxabicyclotridecadiene MODERATE
1,5-Dimethyl-1-Vinylhex-4-Enyl Hexanoate MODERATE
1,5-Dimethylbicyclo[3.2.1]octan-8-one Oxime GOOD
1-Acetonaphthone MODERATE
1-Ethyl-3-Methoxy-Tricycloheptane GOOD
1-Ethylcyclohexane-1,4-Dimethanol GOOD
1-Furfuryl-1H-Pyrrole GOOD
1-Hexen-3-Ol GOOD
1-Methyl-4-methylethenyl-cyclohexene Sulfurized GOOD
1-Methyl-4-methylvinyl-cyclohexanol GOOD
1-Methyl-4-methylvinyl-cyclohexene MODERATE
1-Methyl-4-methylvinyl-cyclohexyl Acetate GOOD
1-Methyldecyl Acetate GOOD
1-Nonen-3-ol GOOD
1-Penten-3-ol MODERATE
1-Phenylpropyl Acetate GOOD
1-Trimethyl-2-Cyclohexenyl-1-Penten-3-One MODERATE
1-Trimethyl-3-Cyclohexenylethanone MODERATE
10-Hydroxy-1,8-p-Menthadiene GOOD
10-Undecenyl Acetate GOOD
2,2-Dimethyl-3-Phenylpropionaldehyde MODERATE
2,3,4,4a,5,6,7,8-Octahydro-2,5,5-Trimethyl-2-Naphthol GOOD
2,3,6-Trimethylcyclohexylmethyl Acetate GOOD
2,3,6-Trimethylphenol MODERATE
2,3-DIHYDRO-2,2,6-TRIMETHYLBENZALDEHYDE GOOD
2,3-Diethylpyrazine GOOD
2,3-Dihydro-2,2,6-trimethylbenzaldehyde (Safranal) GOOD
2,3-Dimethyl-2-nonenenitrile GOOD
2,3-Dimethyl-4-(2,6,6-trimethyl-1-cyclohexenyl)-2-butenal GOOD
2,3-XYLENOL GOOD
2,4,6-Trimethyl-3-cyclohexenecarbaldehyde MODERATE
2,4,6-Trimethyl-3-cyclohexenyl-4-penten-3-one GOOD
2,4,6-Trimethyl-4-phenyl-1,3-dioxane GOOD
2,4,6-Trimethylcyclohexylmethyl acetate GOOD
2,4-DIMETHYL-2-(5,6,7,8-TETRAHYDRO-3,5,5,6,8,8-HEXAMETHYL-2-NAPHTHALENYL)-1,3-DIOXOLANE GOOD
2,4-DIMETHYLBENZYLACETATE GOOD
2,4-DIMETHYLHEPTA-2,2-DIENAL GOOD
2,4-Diethylphenyl Methyl Ketone GOOD
2,4-Dimethyl Cyclohexenecarbonitrile GOOD
2,4-Dimethyl-3-cyclohexene Carboxaldehyde MODERATE
2,4-Dimethyl-3-cyclohexene-1-methanol GOOD
2,4-Dimethyl-3-cyclohexene-1-methylacetate GOOD
2,4-Dimethyl-4-phenyltetrahydrofuran MODERATE
2,4-Dimethylbenzyl acetate GOOD
2,4-Dimethylcyclohexylmethyl acetate GOOD
2,4-Dimethylhepta-2,6-dienal MODERATE
2,4-Dimethylpyridine POOR
2,4-Hexadienal MODERATE
2,4-Hexadienol GOOD
2,4-Hexadienyl acetate GOOD
2,5,6-TRIMETHYL-2-CYCLOHEXENONE GOOD
2,5-DIHYDRO-4-METHYLTHIAZOL-5-ETHANOL GOOD
2,5-DIMETHYL-2-VINYLHEX-4-ENAL GOOD
2,5-DIMETHYLPYRAZINE GOOD
2,5-XYLENOL GOOD
2,6,6-TRIMETHYL-1-CYCLOHEXENE-1-ACETALDEHYDE GOOD
2,6,6-TRIMETHYL-2-CYCLOHEXENE-1-CARBALDEHYDE GOOD
2,6,6-TRIMETHYLCYCLOHEXENE-1-CARBALDEHYDE GOOD
2,6,6-Trimethyl-2-Cyclohexene-1-Carbaldehyde (α-Cyclocitral) GOOD
2,6,6-Trimethyl-2-cyclohexene-1-acetaldehyde GOOD
2,6,6-Trimethylcyclohexene-1-Carbaldehyde (β-Cyclocitral) MODERATE
2,6-DIMETHYL-7-OCTEN-2-OL GOOD
2,6-DIMETHYLHEPTA-1,5-DIENE GOOD
2,6-Dimethyl-4-heptanol GOOD
2,6-Dimethyl-4-heptanone MODERATE
2,6-Dimethyl-7-octen-2-ol (Dihydromyrcenol) EXCELLENT
2,6-Dimethylhepta-1,5-diene (Geraniolene) GOOD
2,6-Dimethylheptanol GOOD
2,6-Dimethylpyrazine GOOD
2,7-Dimethyl-10-isopropyl-1-oxaspiro-3,6-decadiene GOOD
2,7-Dimethyl-5-Octen-4-One MODERATE
2,7-Dimethyl-6-Octen-4-One MODERATE
2-(1-Ethylpropyl)Pyridine MODERATE
2-Acetonaphthone MODERATE
2-Benzylheptanol GOOD
2-Carenyl Methyl Ketone GOOD
2-Cyclohexenyl Cyclohexanone GOOD
2-Cyclohexylethyl Acetate GOOD
2-DIMETHYLCYCLOHEXENYL-5-METHYL-5-METHYLPROPYL-1,3-DIOXANE GOOD
2-Decenal MODERATE
2-Decenol GOOD
2-Dimethylbicyclohept-2-Ylidene Ethanol GOOD
2-Dimethylcyclohexenyl-5-Methyl-5-Methylpropyl-1,3-Dioxane (Karanal®) GOOD
2-Dodecenal MODERATE
2-Dodecenol GOOD
2-ETHOXY-2,6,6-TRIMETHYL-9-METHYLENEBICYCLO[3.3.1]NONANE GOOD
2-Ethoxy-2,6,6-Trimethyl-9-Methylenebicyclo[3.3.1]Nonane (Boisiris™) EXCELLENT
2-Ethyl-1,3,3-Trimethylbicyclo[2.2.1]Heptan-2-Ol GOOD
2-Ethyl-2-(3-Methylbut-2-Enyl)Hex-3-Enol MODERATE
2-Ethyl-3,(5 Or 6)-Dimethylpyrazine GOOD
2-Ethyl-3,5-Dimethylpyrazine GOOD
2-Ethyl-3-Methylpyrazine GOOD
2-Ethyl-4-Hydroxy-5-Methylfuran-3(2H)-One MODERATE
2-Ethyl-5-Methoxy-Bicycloheptane MODERATE
2-Ethylbutanol GOOD
2-Ethylbutyl Cyclopent-1-Eneacetate MODERATE
2-Ethylbutyl Cyclopent-2-Eneacetate MODERATE
2-Ethylbutyric Acid GOOD
2-Ethylhexanol GOOD
2-Ethylidenedecanal MODERATE
2-Ethylpentyl-1,3-Dioxolane GOOD
2-Furancarbaldehyde/Heptanal Hydrogenated MODERATE
2-Furfuryleneoctanal MODERATE
2-Furyl Methyl Ketone GOOD
2-Furylmethanethiol MODERATE
2-Heptanol GOOD
2-Heptylcyclopentanone GOOD
2-Heptylfuran MODERATE
2-Heptylidenecyclopentanone MODERATE
2-Hexanol GOOD
2-Hexenol GOOD
2-Hexyl-1,3-Dioxanol MODERATE
2-Hexyl-1,3-Dioxolane MODERATE
2-Hexyl-1,3-Dioxolane-4-Methanol MODERATE
2-Hexylidenecyclohexan-1-One ⚠️ MODERATE
2-Hexylidenecyclopentanone ⚠️ MODERATE
2-Isobutyl-3-methoxypyrazine GOOD
2-Isobutylquinoline GOOD
2-Isopentenal MODERATE
2-Isopentenyl Phenethyl Ether GOOD
2-Isopentenyl Salicylate GOOD
2-Isopropyl-4-Methylanisole GOOD
2-Isopropyl-5-Methylanisole GOOD
2-METHYLPROPANOL GOOD
2-Melozol Acetate GOOD
2-Melozol Formate GOOD
2-Methoxy-3-Methylpyrazine GOOD
2-Methoxy-4-Methoxymethyl-Phenol GOOD
2-Methoxy-p-Cresol MODERATE
2-Methoxyphenol/2,2-Dimethyl-3-Methylenebicyclo-Heptane Hydrogenated MODERATE
2-Methyl 5-Phenylpentanol MODERATE
2-Methyl-1,5-Dioxaspiroundecane GOOD
2-Methyl-2-Butenol MODERATE
2-Methyl-2-Octanol GOOD
2-Methyl-3-(1,7,7-Trimethylbicyclohept-2-Yloxy)-Propanol GOOD
2-Methyl-3-Buten-2-Ol GOOD
2-Methyl-3-Oxopropoxy-Pyran-4-One MODERATE
2-Methyl-3-P-Cresyl-Propionaldehyde MODERATE
2-Methyl-4-(2,2,3-Trimethyl-3-Cyclopentenyl)-2-Buten-1-Ol GOOD
2-Methyl-4-(2,6,6-Trimethyl-1-Cyclohexenyl)-2-Butenal MODERATE
2-Methyl-4-(2,6,6-Trimethyl-2-Cyclohexenyl)-2-Butenal MODERATE
2-Methyl-4-(2,6,6-Trimethyl-2-Cyclohexenyl)-3-Butenal MODERATE
2-Methyl-5-Methylvinyl-Cyclohexanol GOOD
2-Methylbenzoxazole MODERATE
2-Methylbutane-2-Thiol MODERATE
2-Methylbutanol GOOD
2-Methylbutyl Butyrate GOOD
2-Methylbutyl Isovalerate GOOD
2-Methylbutyraldehyde MODERATE
2-Methylbutyric Acid GOOD
2-Methyldodecanal MODERATE
2-Methylfuran-3-Thiol MODERATE
2-Methylnaphthalene MODERATE
2-Methylpent-2-Enoic Acid MODERATE
2-Methylpent-2-Enyl Acetate GOOD
2-Methylpent-3-Enoic Acid GOOD
2-Methylpentyl 2-Methylvalerate GOOD
2-Methylpropanal MODERATE
2-Methylpropanol (Isobutanol) GOOD
2-Methylpropyl-1-Vinylcyclohexyl Acetate MODERATE
2-Methylundecanol GOOD
2-Nonylcrotonaldehyde GOOD
2-Nonyn-1-Al Dimethylacetal GOOD
2-O-Cresylethanol GOOD
2-Octanol GOOD
2-Octenal MODERATE
2-P-Cresylethanol GOOD
2-P-Cresyloxyethyl Acetate GOOD
2-Pentanol GOOD
2-Phenylpropylpyridine MODERATE
2-Phenylpropyltetrahydrofuran GOOD
2-Propanol/Boron Trifluoride/Ethylidenebicycloheptene GOOD
2-Sec-Butylcyclohexanone GOOD
2-T-Butylcyclohexyl Acetate GOOD
2-T-Butylcyclohexyloxybutanol MODERATE
2-Tert-Butyl-4-Methyl-Cyclohexanol Acetate GOOD
2-Tert-Butyl-4-Methylcyclohexanol GOOD
2-Tert-Butyl-5-Methylanisole MODERATE
2-Tert-Butyl-P-Cresol MODERATE
2-Tert-Butylcyclohexanol GOOD
2-Tert-Butylcyclohexanone GOOD
2-Tert-Butylcyclohexyl Ethyl Carbonate GOOD
2-Tert-Butylcyclohexyl Propionate GOOD
2-Tert-Butylhydroquinone Methyl Ether MODERATE
2-Trans, 6-Cis-Nonadienol GOOD
2-Trans, 6-Trans-Nonadienal Diethyl Acetal GOOD
2-Trans, 6-Trans-Nonadienyl Acetate GOOD
2-Undecenal MODERATE
2-Undecenenitrile GOOD
2-Undecenol GOOD
2-m-Cresylethanol GOOD
3,3,5-Trimethylcyclohexyl Succinate Dimethylamide GOOD
3,3-Dimethyl-1,5-Dioxaspiro-Undecane GOOD
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