ALPHA-ISO-METHYLIONONE
Synonym(s):α-Cetone;3-Methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one;Isomethyl-α-ionone
- CAS NO.：127-51-5
- Empirical Formula: C14H22O
- Molecular Weight: 206.32
- MDL number: MFCD00034582
- EINECS: 204-846-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:22:15
What is ALPHA-ISO-METHYLIONONE?
Description
α-Isomethylionone has a fine violet and orris-like odor. This substance may be synthesized by condensation of citral with methyl ethyl ketone controlling the ratio between the n- and iso-forms; the methyl pseudo-ionone obtained is then subjected to ring closure, using strong alkali and high temperature (thus favoring the formation of the normal α- and β-methylionones) or with quaternary ammonium base (thus favoring the formation of wo-forms); See also monographs of α- and β-ionone and methyl α-, β-, and γ-ionones.
Chemical properties
α-Isomethylionone has a fine violet and orris-like odor.
Preparation
By condensation of citral with methyl ethyl ketone controlling the ratio between the n- and iso-forms; the methyl pseudoionone obtained is then subjected to ring closure, using strong alkali and high temperature (thus favoring the formation of iso-forms); See also monographs of α-, β-, and γ-ionones.
Definition
ChEBI: 3-Methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one is a sesquiterpenoid.
Flammability and Explosibility
Not classified
Contact allergens
As a fragrance allergen, a-isomethylionone has to be mentioned by name in cosmetics within the EU.
Properties of ALPHA-ISO-METHYLIONONE
| Boiling point: | 121-122℃ (9 Torr) |
| Density | 0.93 g/mL at 20 °C(lit.) |
| vapor pressure | 0.22Pa at 20℃ |
| refractive index | 1.50188 (589.3 nm 20℃) |
| FEMA | 2714 | ALPHA-ISO-METHYLIONONE |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | Chloroform (Slightly), DMSO (Slightly), Methanol (Slightly) |
| form | liquid |
| color | Light orange to Yellow to Green |
| Odor | at 10.00 % in dipropylene glycol. woody violet floral |
| Water Solubility | 27.953mg/L at 25℃ |
| JECFA Number | 404 |
| Stability: | Light Sensitive |
| EPA Substance Registry System | 3-Buten-2-one, 3-methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)- (127-51-5) |
Safety information for ALPHA-ISO-METHYLIONONE
| Signal word | Warning |
| Pictogram(s) |
 Environment GHS09 |
| GHS Hazard Statements |
H411:Hazardous to the aquatic environment, long-term hazard |
| Precautionary Statement Codes |
P273:Avoid release to the environment. P391:Collect spillage. Hazardous to the aquatic environment P501:Dispose of contents/container to..… |
Computed Descriptors for ALPHA-ISO-METHYLIONONE
New Products
DL-beta-(3-Bromophenyl)alanine Tetrabutylammonium perchlorate N,O-Dimethylhydroxylamine hydrochloride (RS)-beta-Amino-beta-(4-bromophenyl)propionic acid 2-Amino-5-bromo-4-(trifluoromethyl)pyridine（RM for Indian lab) N,N CARBONYL DIIMIDAZOLE Levothyroxine Impurity-F Montelukast EP Impurity-D/Montelukast USP Related Compound C Atorvastatin FXA Impurity/Atorvastatin Cyclic 6-Hydroxy Impurity Sodium Salt Isosulfan blue Keto N-Oxide Impurity Ivermectin Impurity F N-Nitroso des Methyl Tramadol/N-Nitroso-N-Desmethyl-Tramadol (R)-BoroLeu-(+)-Pinanediol-CF3COOH 1,4-bis(methylsulfonyl)butane 4-(5-amino-1-methyl-1h-benzoimidazol-2-yl)-butyric acid isopropyl ester. 5-Methyl-1,3-benzenediacetonitrile 4-Fluorothiophenol 1-methyl amino-2,4-dinitro benzene CSA (DL-10-Camphorsulfonic Acid) 2-Hydroxy-4-methylnicotinic acid 3-iodo-1H-pyrazolo[3,4-d]pyrimidin-4-amine (2S)-1-((2S,3S)-3-(2-methylbutyl)-4-oxooxetan-2-yl)pentadecan-2-yl formylleucinate 1-(3,5-dichlorophenyl)-2,2,2-trifluoroethane-1-sulfonyl chloride S-(1-(3,5-dichlorophenyl)-2,2,2-trifluoroethyl) ethanethioateRelated products of tetrahydrofuran
You may like
-
127-51-5 GAMMA METHYL IONONE 99%View Details
127-51-5 -
127-51-5 ALPHA-Isomethylionone 98%View Details
127-51-5 -
α-iso-Methylionone CAS 127-51-5View Details
127-51-5 -
alpha-Isomethylionone CAS 127-51-5View Details
127-51-5 -
3-Methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one CAS 127-51-5View Details
127-51-5 -
α-Cetone CAS 127-51-5View Details
127-51-5 -
Alpha-Isomethyl Ionone (127-51-5), 98%View Details
127-51-5 -
Alpha Isomethyl Ionone, 99%View Details
127-41-3