Fontarôme Chemical Inc.’s 5-methyl-2-hepten-4-one (filbertone, hazeltone; FEMA# 3761, CAS# 81925-81-7) provides a roasted, nutty, coffeelike scent or taste in fragrance or flavor applications. It can also feature a cocoa taste, and it occurs naturally in hazelnuts. Its applications include macadamia and caramel flavors, as well as hazelnut, coffee and tobacco fragrances.

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