What is DL-citronellol?
DL-citronellol (CAS Number 106-22-9) is an aliphatic alcohol belonging to the terpene family of organic compounds. It exists as a racemic mixture of two enantiomers (D and L forms), which is why it is designated "DL." The compound occurs naturally in essential oils derived from plants such as rose, geranium, citronella, and lemongrass. Structurally, it is a 10-carbon alcohol with a molecular formula of C10H20O. The naturally-derived forms of citronellol have been used in fragrances and flavorings for centuries, and synthetic versions are now produced commercially to meet industrial demand.
Common Uses
DL-citronellol is primarily used as a flavoring agent and flavor adjuvant in the food and beverage industry. Its characteristic floral, slightly fruity, and rose-like aroma makes it valuable in formulations for:
- Beverages including soft drinks, alcoholic drinks, and flavored waters
- Confectionery and candy products
- Baked goods and desserts
- Dairy products including yogurts and flavored milks
- Gelatin-based products
- Chewing gums and breath freshening products
The compound typically appears in formulations in very small concentrations, measured in parts per million (ppm). Its role is to enhance or modify the overall flavor profile rather than serve as a primary flavor component.
Safety Assessment
DL-citronellol has been extensively evaluated for safety in food applications. The compound presents a favorable safety profile based on available scientific evidence:
- **FDA Reporting**: According to FDA adverse event reporting systems, there are zero documented adverse events associated with DL-citronellol consumption
- **Recall History**: The FDA has recorded zero recalls specifically attributed to DL-citronellol
- **Toxicological Profile**: As a terpene alcohol similar to compounds found in commonly consumed foods and essential oils, DL-citronellol does not present acute toxicity concerns at concentrations used in food
- **Dermal and Respiratory Exposure**: While citronellol is known to be a contact allergen for sensitive individuals in cosmetic and personal care applications at higher concentrations, food-level exposures present significantly lower risk
The absence of FDA adverse events and recalls reflects both the safety of the compound at use levels and its long history of use in flavoring applications without significant safety signals.
Regulatory Status
DL-citronellol is **not approved as a Generally Recognized as Safe (GRAS)** substance by the FDA. Despite this classification, the compound is permitted for use in food flavoring under 21 CFR 182.60 as a synthetic flavoring substance. This regulatory pathway allows its use when it complies with FDA regulations for food additives and when the quantity used achieves the intended flavoring effect without presenting safety concerns.
In the European Union, citronellol is listed in the EFSA Flavourings Panel database as a flavoring substance with evaluated safety data. It is approved for use in flavoring applications within European food products under existing legislation governing flavor additives.
The compound is also approved in other major food regulatory jurisdictions including Canada, Japan, and Australia for use as a flavor ingredient.
Key Studies
Scientific research on citronellol's safety includes:
- **EFSA Flavourings Panel Reviews**: The European Food Safety Authority has evaluated citronellol and related terpenes as part of its systematic assessment of flavoring substances, noting no safety concerns at use levels in food
- **Structural Class Assessment**: As a member of the aliphatic alcohol class of flavoring compounds, citronellol falls within assessed safety parameters established for this chemical category
- **Natural Occurrence Studies**: Research documenting citronellol's presence in traditional food sources and essential oils supports the compound's historical safe use
The lack of both adverse event reports and regulatory restrictions, combined with the compound's natural occurrence in food sources, indicates that DL-citronellol is well-tolerated at typical food application levels.