127-43-5

Basic information

• Product Name: BETA-N-METHYLIONONE
• Synonyms: (1E)-1-(2,6,6-Trimethyl-1-cyclohexen-1-yl)-1-penten-3-one;1-(2,6,6-trimethyl-1;1-(2,6,6-trimethyl-1-cyclohexen-1-yl)-1-penten-3-on;1-(2,6,6-trimethyl-1-cyclohexen-1-yl)pent-1-en-3-one;1(Z)-(2,6,6-trimethyl-cyclohex-1-enyl)-pent-1-en-3-one;1-Penten-3-one, 1-(2,6,6-trimethyl-1-cyclohexen-1-yl)-;5-(2,6,6-Trimethyl-1-cyclohexenyl)-4-penten-3-one;beta-Ionone, methyl-
• CAS NO: 127-43-5
• Molecular Formula: C₁₄H₂₂O
• Molecular Weight: 206.32
• EINECS: 204-843-7
• Product Categories: ketone Flavor
• Mol File: 127-43-5.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 301 °C at 760 mmHg
• Flash Point: 130.8 °C
• Appearance: /
• Density: 0,94 g/cm3
• Vapor Pressure: 0.00108mmHg at 25°C
• Refractive Index: 1.514
• Merck: 5095
• CAS DataBase Reference: BETA-N-METHYLIONONE(CAS DataBase Reference)
• NIST Chemistry Reference: BETA-N-METHYLIONONE(127-43-5)
• EPA Substance Registry System: BETA-N-METHYLIONONE(127-43-5)

Safety Data

• Safety Statements: 23-24/25
• Hazardous Substances Data: 127-43-5(Hazardous Substances Data)

Usage

Description

Methyl-P-ionone has an odor similar to P-ionone with a Bulgarian leather note. May be prepared by condensation of citral with methyl ethyl ketone (see α-isomethylionone); it is usually present in low levels (6 - 7%) in commercial products.

Chemical Properties

Methyl-β-ionone has an odor similar to β-ionone with a leather note

Preparation

By condensation of citral with methyl ethyl ketone (see α-isomethylionone); it is usually present in low levels (6 to 7%) in commercial products

InChI:InChI=1/C14H22O/c1-5-12(15)8-9-13-11(2)7-6-10-14(13,3)4/h8-9H,5-7,10H2,1-4H3/b9-8+

Upstream product

• 26651-96-7 7,11-dimethyl-dodeca-4,6,10-trien-3-one 

Relevant articles and documents

CONTINUOUS PROCESS FOR PRODUCING PSEUDOIONONES AND IONONES

The invention relates to a continuous process for producing pseudoionones of general formulas (I) and (I′) as well as isomers thereof, whereby: R1represents CH3 or (a); R2 and R3 represent hydrogen, CH3 or C2H5, and; R4 and R5represent hydrogen or CH3. These pseudoionones are produced by reacting an aldehyde of formula (II) with an excess of a ketone of general formula (III), whereby R1, R2 and R3 have the aforementioned meanings, in the presence of water and alkali hydroxide at an increased temperature and in a homogeneous solution. The inventive process is characterized in that: a) the intermixing of the homogeneous solution consisting of aldehyde, ketone and aqueous alkali lye occurs at a temperature ranging from 10 to 120 °C; b) the undissolved water and alkali hydroxide contained in the reaction mixture are subsequently separated out; c) while avoiding back mixing, the homogeneous reaction mixture is then guided through a reactor, which permits a residence time ranging from 2 to 300 minutes, at a temperature that is 10 to 120 °C higher than the boiling point of the lowest-boiling component and under a vapor pressure p ranging from 106 to 107 Pa; d) the reaction mixture is cooled by expansion; e) ketone is removed from the reaction mixture using vapor flowing in the opposite direction and; f) the raw product is dried and rid from excessive aldehyde and secondary components via a rectification column.