What is Isopropyl Cinnamate?
Isopropyl cinnamate (CAS Number 7780-06-5) is an organic ester derived from cinnamic acid and isopropyl alcohol. It belongs to the class of cinnamate esters, which are aromatic compounds found naturally in cinnamon and other spice plants. The compound has a molecular formula of C12H14O2 and appears as a colorless to pale yellow liquid with a characteristic spicy-sweet aroma reminiscent of cinnamon.
Common Uses
Isopropyl cinnamate is utilized primarily as a flavoring agent and flavor enhancer in the food and beverage industry. It is added to products to impart or enhance cinnamon-like and warm spice notes. Common applications include:
- Flavored beverages (soft drinks, coffee products)
- Confectionery and candy formulations
- Baked goods and bakery products
- Dairy products (yogurts, flavored milk)
- Seasonings and flavor blends
- Pharmaceutical and nutraceutical preparations for taste masking
The compound is typically used in very small quantities, measured in parts per million (ppm), as flavoring agents require only minimal amounts to achieve desired sensory effects.
Safety Assessment
Isopropyl cinnamate has not been formally affirmed by the FDA as Generally Recognized As Safe (GRAS). However, the lack of GRAS status does not automatically indicate a safety concern; rather, it reflects that formal GRAS affirmation has not been pursued or completed through the FDA's review process.
Relevant safety observations include:
- **FDA Adverse Events**: Zero reported adverse events associated with isopropyl cinnamate are documented in the FDA database.
- **FDA Recalls**: No product recalls involving this additive have been initiated by the FDA.
- **Exposure Levels**: As a flavoring agent, human dietary exposure is minimal due to the small concentrations used in food products.
- **Chemical Structure**: Isopropyl cinnamate is structurally related to naturally occurring cinnamates found in foods and spices, which have long histories of safe consumption.
The absence of reported adverse events and regulatory recalls suggests a favorable safety profile within current use patterns and concentrations.
Regulatory Status
In the United States, isopropyl cinnamate is not currently listed on the FDA's GRAS inventory of flavoring substances. This means it operates outside the GRAS framework and may require pre-market notification or food additive petition approval depending on its intended use and classification.
The regulatory status varies by jurisdiction:
- **United States**: Not GRAS-affirmed; regulatory pathway depends on specific product application
- **European Union**: Evaluated under EU flavoring regulations; approval status varies by specific formulation
- **Other Regions**: Individual country regulations apply; some nations permit its use in food while others restrict or prohibit it
Manufacturers using isopropyl cinnamate should verify compliance with applicable regulations in their target markets, as requirements differ significantly across regions.
Key Studies
Published scientific literature on isopropyl cinnamate specifically is limited compared to more extensively studied food additives. However, relevant research includes:
- Studies on the cinnamate ester class of compounds, which demonstrate general chemical stability and metabolism patterns in biological systems
- Research on structurally similar compounds (other cinnamate esters) that support the safety profile of this chemical class
- Organoleptic studies demonstrating its effectiveness as a flavoring agent at typical use levels
The limited specific toxicological data reflects the compound's narrow use as a specialty flavoring ingredient. Given its structural similarity to naturally occurring plant compounds and the absence of reported adverse effects, the available evidence does not suggest significant safety concerns at approved use levels.