Geranyl acetate: properties, uses, pros, cons, safety
Geranyl Acetate is a monoterpene ester of geraniol and acetic acid, used mainly as a fragrance ingredient in cosmetics, perfumery, detergency, and flavourings. It has a typically floral, rosy, fruity, green, lavender-like, and slightly waxy olfactory profile. In cosmetics, the functions reported by CosIng are tonic and perfuming, while the main regulatory point is its inclusion in Annex III, entry 369, with mandatory label declaration above threshold.
Description
Geranyl Acetate is an odorant substance naturally present in several essential oils and also used as a synthetic or semi-synthetic raw material. It is closely related to Geraniol, from which it derives by acetylation, and should be distinguished from Neryl Acetate, the cis/Z geometric isomer related to nerol. This distinction is important because isomers and esterified derivatives may have different olfactory and regulatory profiles.
From a cosmetic standpoint, it is used almost exclusively to improve the olfactory pleasantness of the product or to contribute to a “tonic” and fresh cosmetic sensation. It should not be interpreted as a curative dermatological active: its main function is sensory.
Regulation (EU) 2023/1545 included it among fragrance allergens to be indicated individually in the ingredient list when it exceeds 0.001% in leave-on products and 0.01% in rinse-off products. This does not mean that it is prohibited, but that it must be declared to protect sensitized consumers.
Production process
Geranyl Acetate can be obtained by isolation from essential oils or by synthesis. The natural route involves fractional distillation or separation from essential oils that contain it. The most common synthetic route consists of the acetylation of geraniol with acetic acid, acetic anhydride, or other acetylating systems, followed by purification and control of olfactory quality.
After synthesis or isolation, the usual controls include assay, odor, color, acid value, isomers, process residues, solvents, peroxides, and stability. In perfumery and cosmetics, quality does not depend only on chemical purity, but also on odor refinement, oxidative stability, and the supplier’s regulatory documentation.
Main compounds present
In the pure grade, the main compound is Geranyl Acetate. In natural grades or materials isolated from essential oils, small amounts may be present, including:
Geraniol;
Nerol;
Neryl Acetate;
Citronellol;
Linalool;
Linalyl Acetate;
minor terpenes and other odorant esters.
From an allergological standpoint, it is important to remember that Geranyl Acetate is an ester of Geraniol, a substance known for its relevance among fragrance allergens. SCCS documentation on fragrance allergens also considers the issue of odorant esters that may be hydrolyzed or related to their parent alcohols.
Identification data and specifications
| Characteristic | Value | Note |
|---|---|---|
| INCI name | Geranyl Acetate | cosmetic designation |
| Annex III chemical name | 2,6-Octadien-1-ol, 3,7-dimethyl-, 1-acetate, (2E) | name reported in the restriction entry |
| Synonyms | Geraniol acetate; Geranyl ethanoate; Acetic acid geranyl ester | technical synonyms |
| Chemical category | monoterpene ester | acetate of geraniol |
| Molecular formula | C12H20O2 | compound formula |
| Molecular weight | about 196.29 g/mol | theoretical value |
| CAS | 105-87-3 | reported in CosIng and Annex III |
| EC | 203-341-5 | European reference |
| FEMA | 2509 | flavouring use |
| JECFA | 58 | flavouring use |
| CosIng functions | tonic; perfuming | from the CosIng sheet |
| EU restriction | Annex III, entry 369 | fragrance allergen to be declared above threshold |
| Leave-on threshold | 0.001% | mandatory label indication above threshold |
| Rinse-off threshold | 0.01% | mandatory label indication above threshold |
Indicative physicochemical properties
| Characteristic | Indicative value | Note |
|---|---|---|
| Appearance | clear liquid | typical of purified grades |
| Color | colorless or very pale yellow | may vary according to quality and oxidation |
| Odor | floral, rose, lavender, fruity, green | typical profile of the substance |
| Water solubility | very low / insoluble | requires adequate solubilization |
| Alcohol solubility | good | useful in perfumery |
| Oil solubility | good | compatible with lipophilic phases |
| Density / specific gravity | about 0.900-0.914 | JECFA data for flavouring use |
| Refractive index | about 1.458-1.464 | JECFA data |
| Boiling point | about 240-245 °C | indicative value |
| Flash point | above about 100 °C | depends on source and method |
| Stability | sensitive to light, oxygen, and heat | store tightly closed and protected |
JECFA specifications describe it as a colorless liquid with a floral odor, soluble in alcohol and fixed oils, insoluble in water and glycerin, with a boiling point around 240-245 °C and minimum purity of 90% by ester determination.
Food
In the food sector, Geranyl Acetate is used as a flavouring, not as a nutrient. FEMA reports it with FEMA No. 2509, JECFA No. 58, reference 21 CFR 182.60, and a lavender/rose aromatic profile.
JECFA classifies it as a flavouring agent and indicates no safety concern at current levels of intake when used as a flavouring; a group ADI expressed as citral is maintained for citral, geranyl acetate, citronellol, linalool, and linalyl acetate.
From a nutritional standpoint, it does not provide direct benefits. Its value is sensory, linked to floral, fruity, rosy, and aromatic notes.
Cosmetics
In cosmetics, Geranyl Acetate is used mainly as a perfuming ingredient. It may appear in perfumes, creams, lotions, soaps, cleansers, shampoos, conditioners, deodorants, body products, hair products, and formulas where a rosy, floral, fruity, or lavender-like note is desired.
The perfuming function is the most relevant. The tonic function reported by CosIng should be understood as a cosmetic sensory/toning function, not as a therapeutic or curative effect.
The central regulatory point is Annex III, entry 369. If the concentration in the finished product exceeds:
0.001% in leave-on products;
0.01% in rinse-off products;
the presence of the substance must be indicated in the ingredient list. The restriction entry concerns the substance 2,6-Octadien-1-ol, 3,7-dimethyl-, 1-acetate, (2E), linked to the common name Geranyl Acetate.
Pros
It has a floral, rosy, fruity, and pleasant olfactory profile.
It is very useful as a perfuming ingredient in cosmetics, detergents, and hair products.
It can contribute to rose, lavender, geranium, citrus, and green notes.
It is naturally present in several essential oils, but can also be obtained synthetically.
It is also recognized as a flavouring agent in the food sector.
EU regulation is clear: above threshold, it must be declared on the label.
At low concentrations and in well-designed formulas, it can provide a good sensory contribution.
Cons
It is not a nutritional food ingredient: in food it has only an aromatic function.
In cosmetics it is a fragrance allergen to be declared above threshold.
It may be problematic for individuals sensitized to fragrances or to geraniol-related compounds.
As an odorant ester, stability and possible degradation/hydrolysis must be controlled.
It is poorly soluble in water and requires correct solubilization.
Quality varies according to purity, natural/synthetic origin, isomeric profile, and storage.
In complex essential oils it must be assessed together with other fragrance allergens present in the mixture.
Safety, regulatory aspects, and environment
From a cosmetic standpoint, Geranyl Acetate is not prohibited, but it is subject to mandatory label declaration above the Annex III thresholds. The purpose is to inform sensitized consumers and reduce the risk of unrecognized exposure to fragrance allergens.
The main risk concerns skin sensitization and possible reactions in subjects who are already allergic or predisposed. SCCS documentation on fragrance allergens highlights that, for some odorant substances and their esters, hydrolysis, relationship with the parent compound, and cross-reactions should also be considered.
As a concentrated raw material, Geranyl Acetate may require caution for skin, eyes, and the aquatic environment, according to the supplier’s specific SDS. This does not automatically imply the same level of risk in the finished cosmetic product, but it makes assessment of the actual concentration and complete formula necessary.
For correct cosmetic use, it is advisable to request from the supplier:
updated SDS;
certificate of analysis;
allergen declaration;
IFRA certificate;
data on purity and isomers;
data on acid value, peroxides, and stability;
actual concentration in the fragrance;
declaration of compliance with the EU Cosmetics Regulation;
verification of the concentration in the finished product against Annex III thresholds.
From an environmental standpoint, Geranyl Acetate is a volatile and lipophilic molecule. Its real profile depends on raw material origin, production process, biodegradability, amount used, product category, and environmental fate. In rinse-off products, release into wastewater must be considered; in leave-on products, the main issue remains skin exposure and allergen labeling.
Conclusion
Geranyl Acetate is an ingredient of strong olfactory interest, used mainly as a perfuming ingredient and aromatic component. Its main value is its floral-rosy, fruity, and green note, useful in perfumes, cosmetics, detergents, body products, and hair care.
Professional assessment must consider the updated cosmetic regulation. Geranyl Acetate is included in Annex III, entry 369, with mandatory label indication above 0.001% in leave-on products and 0.01% in rinse-off products. It is therefore not an ingredient to be automatically avoided, but a fragrance allergen to be managed with precise documentation.
In a well-designed formula and with complete supplier documentation, it can be a useful and favorable ingredient. The points to control are purity, origin, stability, solubilization, concentration in the finished product, allergen declaration, IFRA certificate, SDS, COA, and compliance with Annex III of the European Cosmetics Regulation.
