4-Vinylguaiacol, identified by CAS number 7786-61-0, is a naturally occurring phenolic compound renowned for its distinct aromatic profile. Chemically known as 2-methoxy-4-vinylphenol, it presents as a colorless to pale yellow liquid or crystalline solid depending on ambient temperature. It is a key volatile component found in various fermented and roasted products, such as roasted coffee, beer, and smoked meats, contributing significantly to their complex sensory characteristics.
In a laboratory and industrial context, this compound is valued for its reactive vinyl group and phenolic hydroxyl, making it a versatile building block in organic synthesis. Due to its susceptibility to oxidation and polymerization, 4-Vinylguaiacol requires careful handling, typically involving storage in cool, dark environments under an inert atmosphere to maintain its chemical integrity. Its unique spicy, smoky, and clove-like scent makes it an essential ingredient in the development of sophisticated flavor and fragrance formulations.