2-methylbut-2-en-1-ol

2-methylbut-2-en-1-ol (CAS Number 4675-87-0) is an aliphatic alcohol with four carbon atoms and one double bond in its structure. It belongs to the family of flavor compounds known as unsaturated alcohols. The compound is a clear, colorless to pale yellow liquid with fruity and herbaceous organoleptic properties. It occurs naturally in trace amounts in certain fruits and plants, though most food-grade material is synthetically produced.

This flavoring agent is primarily used in the beverage industry, particularly in fruit juice concentrates, soft drinks, and alcoholic beverages. It also appears in confectionery products, baked goods, dairy products, and condiments where it contributes fruity, tropical, and herbal flavor notes. The compound is typically used at very low concentrations—measured in parts per million—since it is highly potent as a flavor component. Its use allows formulators to achieve desired flavor profiles without relying solely on natural extracts or more expensive flavor ingredients.

The safety profile of 2-methylbut-2-en-1-ol is supported by several key data points. The FDA has received zero adverse event reports associated with this compound, indicating no documented consumer harm from its use in food applications. Similarly, the FDA maintains zero recall records involving this flavoring agent, suggesting no product safety issues have been identified through post-market surveillance.

The compound's molecular structure and metabolic fate suggest it follows typical pathways for short-chain alcohols, likely undergoing oxidation and conjugation in the liver before elimination. However, formal toxicological studies specific to this exact substance appear limited in the public literature. The lack of comprehensive published safety data is not uncommon for minor flavor ingredients used at extremely low concentrations.

Importantly, 2-methylbut-2-en-1-ol has not received FDA GRAS (Generally Recognized as Safe) status. This designation does not indicate the compound is unsafe; rather, it means either a formal GRAS petition has not been submitted, was not approved, or the manufacturer has chosen not to pursue this classification. The compound may still be used in food under FDA regulations as a flavor ingredient, provided it meets specific requirements regarding purity, manufacturing controls, and intended use levels.

Regulatory frameworks in other jurisdictions, including the European Union, maintain different approval pathways for flavor substances. Some regulatory bodies may have evaluated this compound under broader flavor ingredient frameworks or natural flavor categories.

Direct peer-reviewed toxicology studies specifically examining 2-methylbut-2-en-1-ol appear limited in readily available scientific literature. Its safety relies partly on structural similarity to other approved flavor alcohols and partly on its minimal use levels in food products. Typical exposure from food consumption would result in very small quantities of this substance reaching the consumer.

The absence of adverse event reports and recalls after years of use in food products provides real-world safety evidence. Food manufacturers are required to comply with FDA regulations on ingredient identity, purity, and intended use levels, which further supports safe application of this flavoring agent.

For formulators and consumers seeking additional information, contacting the flavor supplier for Certificate of Analysis and safety documentation is recommended. The extremely low concentrations used in finished food products—typically less than 10 ppm—further minimize any potential exposure concerns.