FARNESOL
Commonly Found In
Overview
Farnesol is a naturally occurring acyclic sesquiterpene alcohol found in small amounts in rose, neroli, jasmine, and many other floral essential oils. It is used in cosmetics as a fragrance ingredient and deodorant active (inhibiting odor-causing bacteria). It is a mandatory EU labeling allergen in cosmetics above 0.001% in leave-on products (Annex III/82). Studies report sensitization rates of approximately 0.1β0.4% in the general population, making farnesol the lowest-allergenicity ingredient among the 26 EU-regulated fragrance allergens. It is permitted in the US and Japan without specific labeling requirements.
Also known as: Farnesol, (E)-Farnesol, 3,7,11-Trimethyl-2,6,10-dodecatrien-1-ol, trans,trans-Farnesol
Key Benefits
Studies suggest farnesol may contribute antimicrobial and mild anti-inflammatory properties; its primary cosmetic roles are as a fragrance ingredient and deodorant active rather than a direct skin treatment.
Skin Compatibility Ratings
Comedogenic Rating
Non-comedogenic; sesquiterpene alcohol present in many floral essential oils at trace levels.
Source: SCCS/1461/12
Irritancy Rating
Lowest sensitization rate among the 26 EU-regulated fragrance allergens (approximately 0.1β0.4% in general population); EU mandatory label disclosure required above threshold as a precautionary consumer information measure
Source: EU SCCS fragrance allergen opinions; CIR Expert Panel
Typical Use Concentration
Range
0.001β1%
Optimal
0.01β0.5% in fragrance/deodorant applications
EU mandatory labeling above 0.001% (leave-on) / 0.01% (rinse-off). IFRA limits apply. Effective as a deodorant active at 0.1β0.5% by inhibiting odor-causing Gram-positive bacteria.
Works Well With / Avoid
Works Well With
Use With Caution
EU mandatory label disclosure (Annex III/82) above 0.001% in leave-on products. Among the 26 EU-regulated allergens, farnesol has the lowest observed sensitization rate. IFRA provides concentration limits by product category.
Commonly Found In
Global Regulation Summary
Overview of current status across major international markets.
Detailed Regional Status
| Region | Status | Max Conc. | Conditions | Source |
|---|---|---|---|---|
| πͺπΊ EU | Banned | - | - | Official β |
| πΊπΈ USA | Allowed | - | - | Official β |
| π―π΅ Japan | Allowed | - | - | Official β |
| π°π· Korea | Unknown | - | - | Official β |
| π¬π§ UK | Restricted | - | Follows EU regulations (III/82) | Official β |
π Why Regulations Differ
The EU requires mandatory label disclosure of farnesol (Annex III/82) as part of the 26 fragrance allergen labeling regime; it is not prohibited. The 'banned' database status reflects the Annex III restricted classification. The US and Japan do not require specific labeling for farnesol in cosmetics. IFRA provides voluntary concentration guidance internationally.
Regulation Analysis
Regional Agreement
Banned in EU but allowed in USA, Japan.
Category Comparison
There are 37 ingredients in the DEODORANT category. 100% are banned in at least one major market.
Strictness Ranking
πΏ Natural Sources
Found in rose oil (up to 2%), neroli, citronella, ylang-ylang, jasmine, cyclamen, tuberose, and lemongrass. Also present in chamomile, sandalwood, and many citrus blossom oils. Occurs naturally in various fruits and as an intermediate in the biosynthesis of cholesterol and other steroids.
π How It's Made
Extracted from natural essential oils through steam distillation and fractionation. Synthetically produced via hydrogenation of farnesyl acetate or through multi-step synthesis from linalool or nerolidol. Most commercial farnesol is synthetic due to low natural abundance and cost efficiency. Exists as multiple stereoisomers.
π Uses in Cosmetics
Multi-functional ingredient: fragrance component (delicate floral, slightly apple-like aroma) at 0.01-1%, deodorant active (inhibits bacterial growth causing odor) at 0.1-0.5%. EU Regulation (EC) No 1223/2009 Annex III/82 requires mandatory labeling above 0.001% (leave-on) or 0.01% (rinse-off). Popular in anti-aging formulations for claimed cell-turnover benefits.
π¬ Other Applications
Functions as a quorum-sensing molecule in microbiology (bacteria use it to communicate). Has demonstrated antimicrobial activity, particularly against Candida and Staphylococcus. Research shows potential anticancer, neuroprotective, and anti-inflammatory properties. Used in fragrance formulations and aromatherapy. Important intermediate in biochemistry and pharmaceutical research.
π‘ Fun Facts
- β’ One of 26 EU-regulated fragrance allergens requiring labeling since 2003 under Annex III/82.
- β’ Has the lowest allergy rate among the 26 EU-listed fragrance allergens (approximately 0.1-0.4% of the population).
- β’ A sesquiterpene alcohol (15 carbon atoms), larger than most other fragrance allergens which are monoterpenes (10 carbons).
Related Skin Concerns
Data Sources
- β’ EU CosIng database (Annex III/82)
- β’ SCCS fragrance allergen opinions
- β’ CIR Expert Panel β farnesol safety assessment
- β’ IFRA Standards
Last data verification: 2026-04-16
Related Ingredients
LIMONENE
LINALOOL
ABIES ALBA CONE EXTRACT
BENZALKONIUM CHLORIDE
BENZYL ALCOHOL
CEDRUS ATLANTICA BARK OIL
Learn More
Frequently Asked Questions
Why is FARNESOL banned in the EU but allowed in the US?
The EU follows a precautionary principle, banning FARNESOL under III/82 due to potential safety concerns. The US FDA has not found sufficient evidence to prohibit its use, allowing it under different safety assessment standards. This reflects differing regulatory philosophies between the two regions.
Why is FARNESOL banned in the EU but allowed in Japan?
The EU prohibits FARNESOL (III/82) based on their strict safety criteria. Japan's Ministry of Health, Labour and Welfare (MHLW) has evaluated the ingredient and permits its use, potentially with different safety data or usage conditions.
What is FARNESOL used for in cosmetics?
FARNESOL is primarily used for deodorant in cosmetic products. It also serves as perfuming. The ingredient is commonly found in various cosmetic and personal care products.
Which countries regulate FARNESOL?
FARNESOL is banned in EU. It has concentration limits or usage restrictions in UK. The ingredient is freely allowed in JP, US.
Are there alternatives to FARNESOL?
Due to regulatory restrictions on FARNESOL, cosmetic manufacturers often use alternative ingredients with similar functions. For deodorant, alternatives may include other approved ingredients in the same category. Consult product labels for specific formulations, and look for products compliant with your region's regulations.
Disclaimer
The information on this website is for educational and informational purposes only and is not intended as medical advice. While we strive for accuracy based on official government databases, cosmetic regulations change frequently. Always consult with a qualified professional or refer to the latest official regulatory documents for compliance. We are not responsible for any actions taken based on the information provided here.