What is 4-(p-methoxyphenyl)-2-butanone?
4-(p-methoxyphenyl)-2-butanone, identified by CAS Number 104-20-1, is a synthetic flavoring compound belonging to the class of aromatic ketones. The chemical structure consists of a four-carbon chain with a ketone functional group at the second position and a p-methoxyphenyl (para-methoxybenzene) substituent. This compound is designed to impart specific flavor characteristics in food formulations, typically contributing aromatic and potentially anise-like or herbal notes depending on the application context.
Common Uses
As a flavoring agent, 4-(p-methoxyphenyl)-2-butanone is used in the food industry to enhance or modify the taste profile of various products. Its applications may include use in beverages, confectionery, baked goods, and other processed foods where synthetic flavoring compounds are permitted. The specific concentration levels and applications depend on regulatory approval in individual jurisdictions and manufacturer formulation practices. Like many synthetic flavor compounds, it is typically used at very low concentrations measured in parts per million (ppm) to achieve the desired sensory effect.
Safety Assessment
According to FDA records, there have been zero reported adverse events and zero recalls associated with 4-(p-methoxyphenyl)-2-butanone. This absence of documented harm reports suggests no identified acute safety concerns from its use at typical food flavoring levels. However, the lack of adverse event reports does not constitute formal FDA approval or GRAS status. The compound has not undergone the comprehensive safety review process required for GRAS designation, which would involve toxicological testing, metabolism studies, and expert panel evaluation.
The safety profile of synthetic flavor compounds typically depends on factors including chemical structure, proposed use levels, and available toxicological data. Without published peer-reviewed safety studies specific to this compound readily available in public databases, the complete toxicological characterization remains limited in the scientific literature.
Regulatory Status
4-(p-methoxyphenyl)-2-butanone is not listed as GRAS by the FDA. This designation means it has not received formal FDA recognition as safe for its intended use in food. In the United States, flavoring agents not having GRAS status may still be used under specific regulatory frameworks, such as when approved as food additives through the FDA's petition process or when used in products under specific regulatory allowances. Manufacturers seeking to use non-GRAS flavoring compounds must ensure compliance with applicable food additive regulations and labeling requirements.
International regulatory status varies by region. Some jurisdictions maintain their own approval processes for flavoring agents, and this compound's permitted status differs across regulatory bodies including the European Food Safety Authority (EFSA) and other national food safety authorities.
Key Studies
Published toxicological studies specifically evaluating 4-(p-methoxyphenyl)-2-butanone appear limited in the readily accessible scientific literature. Safety assessments for synthetic flavoring compounds typically include acute toxicity testing, mutagenicity assessments, and metabolic fate studies. The absence of formal GRAS documentation suggests that comprehensive safety data packages may not have been submitted to the FDA for this particular compound, or such reviews may remain proprietary to manufacturers.
For consumers and industry professionals seeking additional safety information, contacting the FDA directly or consulting with flavor manufacturers regarding specific product formulations and safety documentation may provide additional detail. Ongoing monitoring by food safety agencies and the continued absence of adverse event reports represent important indicators in the ongoing safety assessment of food additives.