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alpha-Isomethyl ionone 127-51-5
Category : Organic chemicals and Derivatives/Aroma compounds
CAS NO : 127-51-5 EC NO : 204-846-3 MF : C14H22O MW : 206.3239 Specification : 99% min Packing : 25kg，50kg 200kg Product description : What is the chemical ofalpha-Isomethyl ionone ? Appearance: Colorless to pale yellow liquid； Assay:99%min by GC； IR Identity: conform to standard； HNMR： conform to standard； carbon spectrum: conform to standard； Water by K. F.:0.5% max or as per the customer’s request； Loss on drying:0.5% max. or as per the customer’s request； =========================================================================== Alpha-Isomethyl ionone is used in the synthesis of edible flavorings, toiletry fragrances, or fine chemicals. As an edible flavoring, it is permitted for use in accordance with GB 2760—1996, primarily for formulating fruit-type fragrances such as raspberry. In toiletry fragrances, it is widely used in the formulation of perfumes, cosmetics, soaps, and personal care products. As a chemical intermediate, it is employed in the synthesis of other flavorings or fine chemicals. ============================================================================ α-Iso-methylionone can be synthesized by condensing citral with butanone to form methyl pseudoionone, which is then cyclized under strong base and high temperature. In a nitrogen atmosphere, citral, butanone, and solvent methanol are added to a high-pressure reactor and mixed. The catalyst is then added to the high-pressure reactor. After purging with nitrogen, the reaction temperature is controlled at 50°C and maintained for 25 hours. The residual citral content is detected to be 0.45%, yielding methyl pseudoionone. Under nitrogen protection, the catalyst is added, stirred uniformly, and the temperature is raised to 110°C. The reaction continues, maintained at this temperature for 5 hours, with the methyl pseudoionone content detected to be 0.3%, indicating the end of the reaction. Sodium carbonate is then added to neutralize the mixture, followed by solvent and butanone recovery. The crude product is obtained, which is then distilled under an absolute pressure of 100 Pa to yield pure α-iso-methylionone. Based on citral, the molar yield is approximately 98.6%, and the selectivity for α-iso-methylionone is about 98%. (For reference only) Uses : Alpha-isomethyl ionone is used for the synthesis of edible flavorings, toiletry fragrances, or fine chemicals. Synonyms : Methyl lonone;3-Buten-2-one, 3-methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-;3-Methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one;4-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-3-methyl-3-buten-2-one;AI3-36074;Cetone alpha;EINECS 204-846-3;FEMA No. 2714;Isomethyl-alpha-ionone;Methyl-alpha-isoionone;NSC 66432;alpha-Cetone;alpha-Ionone, isomethyl-;Isomethylionone, alpha-;3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one;(3Z)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one;(3E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one;Isomethyl Ionone; Molecular Structure : 
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alpha-Isomethyl ionone