What is Alpha-Santalol?
Alpha-santalol (CAS Number: 115-71-9) is a sesquiterpene alcohol naturally found in sandalwood essential oil, particularly from Santalum album (Indian sandalwood). It is a colorless to pale yellow liquid with a distinctive woody, warm, and slightly sweet aroma characteristic of sandalwood. The compound comprises a significant portion of sandalwood oil and serves primarily as a fragrance and flavoring component in the food industry.
Common Uses
Alpha-santalol is used in the food and beverage industry as a flavoring agent and flavor adjuvant, contributing woody and warm notes to products such as beverages, confections, baked goods, and dairy products. It is typically employed at very low concentrations (parts per million range) to achieve desired sensory characteristics without overwhelming the primary flavor profile. The compound is also utilized in the fragrance, cosmetic, and personal care industries, where it serves similar aromatic functions.
Safety Assessment
Alpha-santalol has no reported adverse events in the FDA database and has not been associated with any FDA recalls. The compound has a long history of use in traditional contexts through sandalwood oil consumption and application. As a naturally derived substance present in sandalwood, which has been used for centuries in various cultures, alpha-santalol generally has a favorable safety profile in the amounts used as a food additive.
The toxicological profile of alpha-santalol is relatively well-characterized due to its presence in sandalwood products. Studies indicate low acute toxicity when ingested in typical food additive quantities. No significant genotoxicity or carcinogenicity concerns have been identified at food-use levels. Dermal and respiratory irritation potential exists with concentrated pure compounds, but this is not relevant to food additive applications where it is heavily diluted.
The European Food Safety Authority (EFSA) has evaluated alpha-santalol and similar sandalwood oil constituents, noting their safety at typical consumption levels. The compound does not bioaccumulate and is readily metabolized by the body.
Regulatory Status
Alpha-santalol is not listed as Generally Recognized as Safe (GRAS) by the FDA, which means it has not undergone the specific GRAS determination process. However, this designation does not indicate a safety concern; rather, it reflects that formal GRAS petition and evaluation has not been submitted to the FDA. Many naturally derived flavoring compounds exist in this regulatory category.
In the European Union, alpha-santalol (derived from sandalwood) is included in the EU's flavor regulation framework for use in food products. It is recognized as acceptable for use as a natural flavoring substance under specific conditions and concentration limits.
In the United States, alpha-santalol may be used as a flavoring ingredient under the FDA's regulations for synthetic and natural flavoring substances (21 CFR 182.60), provided it meets purity and compositional standards. Manufacturers typically maintain strict documentation regarding sourcing, purity, and usage levels.
Key Studies
Research on sandalwood oil and its constituents, including alpha-santalol, has demonstrated favorable safety profiles in human and animal studies. Studies evaluating the dermal absorption and metabolism of sandalwood components indicate rapid elimination and minimal systemic accumulation. In vitro and animal studies have not revealed genotoxic or carcinogenic potential at food-relevant doses.
The long history of sandalwood use in traditional medicine and cosmetics, combined with modern safety evaluations, supports the safety of alpha-santalol when used appropriately as a flavoring agent in food applications. Current usage levels in food products remain well below thresholds associated with any observed adverse effects.