What is 3-isopropenyl-6-oxoheptanoic Acid?
3-isopropenyl-6-oxoheptanoic acid (CAS Number: 4436-82-2) is a synthetic flavoring compound belonging to the class of organic acids with unsaturated hydrocarbon side chains. The compound features an isopropenyl group (a branched vinyl substituent) attached to a seven-carbon backbone containing a ketone functional group. It is produced through chemical synthesis rather than isolated from natural sources, though similar aromatic compounds occur in some plant materials.
Common Uses
This flavoring agent is used in the food industry to impart fruity, floral, and slightly woody flavor notes. Its applications are typically found in:
- Beverages (soft drinks, flavored waters, alcoholic beverages)
- Confectionery and candy products
- Baked goods and dessert preparations
- Dairy products (yogurts, flavored milk)
- Savory prepared foods and sauces
The compound is used in very small quantities—typically in the parts per million (ppm) range—as is standard practice with concentrated flavor compounds. Its specific sensory profile makes it valuable for formulating complex fruity and floral flavor blends.
Safety Assessment
According to FDA records, there are zero reported adverse events associated with 3-isopropenyl-6-oxoheptanoic acid and zero product recalls linked to this ingredient. This absence of adverse event reports suggests a safe history of use in food applications.
The compound's safety profile is further supported by the fact that it is used only in minute quantities in finished food products. Like most synthetic flavoring compounds, exposure levels are tightly controlled through industry standards and formulation practices.
As with all synthetic flavor compounds, the primary safety consideration involves establishing appropriate use levels and ensuring it does not exceed established acceptable daily intake thresholds. Food manufacturers are responsible for ensuring flavoring agents are used at safe and effective levels.
Regulatory Status
3-isopropenyl-6-oxoheptanoic acid is not on the FDA's GRAS (Generally Recognized as Safe) list. However, this designation does not indicate the compound is unsafe; rather, it reflects that formal GRAS petitions and comprehensive safety assessments may not have been submitted to the FDA through official channels. Many synthetic flavoring agents function under CFR Title 21 Part 182 (synthetic flavoring substances and adjuvants) without individual GRAS status.
The compound is permitted for use as a flavoring agent in food, meaning it meets FDA requirements for food additive usage. Manufacturers using this ingredient must comply with FDA regulations regarding safe levels and proper labeling.
The European Food Safety Authority (EFSA) maintains separate flavor ingredient assessments. Manufacturers exporting products containing this flavoring must ensure compliance with both U.S. and European regulatory frameworks.
Key Studies
Scientific literature on 3-isopropenyl-6-oxoheptanoic acid remains limited, which is typical for specialized synthetic flavoring compounds used only in small quantities. The primary safety data comes from:
- FDA food additive petition records and safety assessments
- Manufacturer toxicology studies submitted during regulatory review
- General knowledge of structurally similar organic acid compounds
- Decades of safe use history in food applications
The absence of adverse event reports and recalls provides empirical evidence supporting its safe use history when applied at approved levels. Ongoing industry monitoring and adverse event reporting systems continue to track any potential safety concerns.
More comprehensive toxicological studies would help establish formal acceptable daily intake levels, though current regulatory approval suggests existing safety margins are adequate.