What is Perillaldehyde Propyleneglycol Acetal?
Perillaldehyde propyleneglycol acetal (CAS No. 121199-28-8) is a synthetic flavoring compound created by combining perillaldehyde with propylene glycol. Perillaldehyde itself is a naturally occurring aldehyde found in plants of the Perilla genus, particularly shiso (Perilla frutescens), as well as in spearmint and other mint species. The acetal form—created through a chemical reaction between the aldehyde and propylene glycol—creates a more stable flavoring compound suitable for food manufacturing.
Common Uses
Perillaldehyde propyleneglycol acetal is used as a flavoring agent in various food and beverage products where mint, herbal, or spice-like notes are desired. Its primary applications include:
- Confectionery and hard candies
- Chewing gums
- Beverage flavorings
- Dairy products
- Baked goods
- Condiments and sauces
The compound's stability as an acetal form makes it more suitable for food processing than perillaldehyde alone, as it resists degradation during manufacturing, storage, and shelf life. The typical usage levels in food are very small, typically measured in parts per million (ppm).
Safety Assessment
Perillaldehyde propyleneglycol acetal has not received formal FDA GRAS (Generally Recognized As Safe) status. However, this designation does not indicate the substance is unsafe; rather, it reflects the company's or industry's decision not to pursue formal GRAS notification or approval through the FDA's established procedures.
The individual components of this compound—perillaldehyde and propylene glycol—have established safety profiles. Propylene glycol is widely recognized as safe and used extensively in food, pharmaceuticals, and cosmetics. Perillaldehyde, while less common in commercial food applications, has been studied and is recognized as a natural flavoring component in traditional foods, particularly in Asian cuisines where shiso is a culinary staple.
As of the most recent FDA data available, there have been zero reported adverse events associated with perillaldehyde propyleneglycol acetal and zero product recalls. This absence of adverse event reports suggests no acute safety concerns have emerged from its use in the food supply, though the lack of adverse events does not constitute proof of absolute safety—it may also reflect limited use or monitoring.
Regulatory Status
In the United States, perillaldehyde propyleneglycol acetal is not listed as a GRAS substance under 21 CFR Part 182 or 184. However, it may be used in foods under FDA regulations for synthetic flavoring substances if the company complies with pre-market notification requirements or if it falls within established usage categories for similar flavoring compounds.
Regulatory status varies internationally. The European Food Safety Authority (EFSA) evaluates flavoring compounds through its Flavourings Working Group, though this specific compound may not have undergone formal EFSA assessment. Some countries may permit its use based on acceptance of similar naturally-derived flavoring components.
Key Studies
Limited published peer-reviewed literature specifically addresses perillaldehyde propyleneglycol acetal as an isolated compound. Most relevant safety data comes from studies on perillaldehyde itself and the known safety of propylene glycol. Perillaldehyde has been investigated in traditional medicine contexts and food chemistry research, with studies indicating low acute toxicity in animal models at reasonable exposure levels.
The absence of specific toxicological studies on this particular acetal may reflect its narrow use in food applications and relatively recent development as a commercial flavoring. Manufacturers typically rely on the established safety of component materials and compliance with standard flavor industry practices when novel compounds are developed.