Methyl Heptenone (6-Methyl-5-hepten-2-one)とは？用途・使用量・代替品・規格

Methyl Heptenone, also known as 6-Methyl-5-hepten-2-one, Sulcatone, or Methyl isohexenyl ketone, is an important unsaturated aliphatic ketone organic compound with broad application value in the global flavor and fragrance industry, food flavoring industry, and pharmaceutical chemical intermediate fields. Its chemical name is 6-Methyl-5-hepten-2-one, molecular formula is C8H14O, molecular weight is 126.20. In terms of chemical structure, methyl heptenone belongs to the unsaturated ketone class, containing one carbon-carbon double bond (C=C) and one carbonyl group (C=O). These two functional groups give this compound extremely high chemical reactivity. It is the most important precursor intermediate for the synthesis of high-grade flavors. It plays an irreplaceable backbone role in the global pharmaceutical, flavor, and fragrance synthesis industry chain. Methyl heptenone naturally occurs in guava, tomatoes, ginger, flue-cured tobacco leaves, lemongrass oil, citronella oil, palmarosa oil, cherries, and various citrus essential oils. Additionally, its structural isomer α-methyl heptenone can be converted into β-methyl heptenone when heated with alkali, the latter being the conventional methyl heptenone. Methyl heptenone appears as a colorless to light yellow transparent liquid, with a herbal and fruity aroma at room temperature, with strong fatty and fresh citrus-like notes. It is soluble in most conventional organic solvents but insoluble in water. Due to its strong chemical reactivity and ability to derive a variety of products, it is an important intermediate for the synthesis of pharmaceuticals, flavors, and fragrances.

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Methyl Heptenone is recognized as the golden precursor for flavor synthesis, holding an unshakable position in the global flavor and fragrance industry, food additive industry, and pharmaceutical chemical intermediate fields. Its most outstanding advantages lie in its extremely high chemical reactivity, unique fresh aroma characteristics, irreplaceability as a key synthetic intermediate, and its naturally occurring properties in various essential oils as a nature-identical substance. 1 Extremely High Chemical Reactivity – Golden Precursor for Flavor Synthesis: The molecular structure of methyl heptenone contains both a carbon-carbon double bond and a carbonyl group as active functional groups, allowing it to participate in various types of chemical reactions, including addition, cyclization, condensation, oxidation, and reduction. These reactions enable it to derive a series of compounds with extremely high economic value and application value in the flavor industry, including citral, pseudoionone, linalool, and geraniol. Therefore, methyl heptenone is called the golden precursor of the flavor industry, occupying a very important strategic position in the entire flavor industry chain. 2 Unique Fresh Aroma Characteristics: Methyl heptenone has fresh green, citrus-like, and fruity aromas, with a freshness reminiscent of lemongrass and isobutyl acetate, also featuring sweet notes of apple, banana, and cream. This fresh and natural aroma adds a unique green freshness to fragrance formulations, making it especially suitable for simulating the natural aroma of fruits and plants. 3 Irreplaceability as a Key Synthetic Intermediate: When synthesizing high-grade flavors, methyl heptenone is the key starting raw material for the production of high-value-added flavor compounds such as citral, linalool, geraniol, nerol, irone, and damascone. These synthetic products are widely used in perfume blending, cosmetics, washing products, food and beverage flavoring, and pharmaceuticals, with huge market demand. 4 Nature-identical Properties: Methyl heptenone naturally occurs in lemongrass oil, citronella oil, palmarosa oil, guava, tomatoes, flue-cured tobacco leaves, and various other natural plants and essential oils. This nature-identical origin provides higher consumer acceptance and clean label applicability in food flavoring. 5 Compliant and Safe Usage History: Methyl heptenone has been approved as a permitted food flavor by multiple international authorities including China GB 2760, US FDA, FEMA, and EU CoE, with a long history of safe usage.