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Alpha Methyl Ionone Aroma Chemical
CAS# 7779-30-8

Woody, Floral, Sweet, Violet, Powdery

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Alpha Methyl Ionone is a woody–powdery material with a signature violet/orris nuance-soft, refined, and subtly elegant. It opens warm with gentle floral facets, a hint of dried apricot, and a mild balsamic sweetness, giving a clean, wrapped, and understatedly luxurious effect. Compared with other ionone isomers, Alpha Methyl Ionone is deeper, woodier, and less candied, lending maturity and poise to a composition.

In formulas it acts as a rounder and fixer: it bridges florals to woody bases, smooths the sharp edges of aldehydes and citrus, and adds depth and persistence. It shows good longevity on skin and fabric and performs reliably in soaps and detergents, with moderate yet steady diffusion that supports the fragrance from the heart through the drydown.

Ideal for modern violet, orris, mimosa, and jasmine themes; soft woods (sandalwood, cashmere woods); clean fougères; elegant chypres; and smooth ambers. It blends harmoniously with ionones/irones, orris butter, violet leaf, hedione, linalool, muguet materials, ambroxan, galaxolide, sandalwood, cedar, and vetiver-especially effective when a silky, powdery character is desired without cluttering the structure.

A clear to pale yellow liquid, readily soluble in ethanol and many perfumery solvents. Suggested use level: 0.1–3% depending on theme and base, with higher levels possible for candles and soaps when added substantively. Follow current safety standards and IFRA guidance for each product category. Versatile and highly finishing, Alpha Methyl Ionone serves as a dependable backbone for contemporary floral–woody creations that require long-lasting smoothness and quiet polish.

Technical standards

Physical appearance Transparent liquid Conform
Color Pale yellow to yellow Conform
Specific Gravity @20˚C 0.925 → 0.932 0.927
Refractive Index @20˚C 1.497 → 1.507 1.498
Purity ≥ 92.0% 93.0%

Solubility @25˚C

Solvent Solubility (g/L)
ethanol 1288.72
methanol 988.97
isopropanol 918.34
water 0.43
ethyl acetate 2124.5
n-propanol 1051.86
acetone 1677.43
n-butanol 1173.42
acetonitrile 989.73
DMF 1903.32
toluene 1651.28
isobutanol 782.48
1,4-dioxane 2761.0
methyl acetate 1178.45
THF 3699.72
2-butanone 1561.21
n-pentanol 520.16
sec-butanol 753.38
n-hexane 183.26
ethylene glycol 78.88
NMP 1597.72
cyclohexane 495.91
DMSO 714.17
n-butyl acetate 1510.74
n-octanol 254.63
chloroform 3392.74
n-propyl acetate 762.47
acetic acid 694.84
dichloromethane 2943.96
cyclohexanone 2333.08
propylene glycol 155.82
isopropyl acetate 1399.83
DMAc 1441.21
2-ethoxyethanol 576.24
isopentanol 1016.1
n-heptane 95.96
ethyl formate 722.44
1,2-dichloroethane 2073.05
n-hexanol 988.0
2-methoxyethanol 1262.45
isobutyl acetate 569.99
tetrachloromethane 515.35
n-pentyl acetate 592.78
transcutol 4033.91
n-heptanol 289.85
ethylbenzene 495.81
MIBK 965.33
2-propoxyethanol 1417.79
tert-butanol 1093.63
MTBE 1909.16
2-butoxyethanol 565.56
propionic acid 530.66
o-xylene 631.89
formic acid 187.23
diethyl ether 2618.36
m-xylene 911.43
p-xylene 569.0
chlorobenzene 1418.03
dimethyl carbonate 509.96
n-octane 28.46
formamide 331.26
cyclopentanone 2136.06
2-pentanone 1775.01
anisole 928.1
cyclopentyl methyl ether 2048.66
gamma-butyrolactone 1911.71
1-methoxy-2-propanol 1012.57
pyridine 1948.74
3-pentanone 1212.13
furfural 1415.21
n-dodecane 18.83
diethylene glycol 601.91
diisopropyl ether 701.22
tert-amyl alcohol 846.2
acetylacetone 1493.41
n-hexadecane 23.45
acetophenone 629.58
methyl propionate 1351.57
isopentyl acetate 1371.94
trichloroethylene 3531.5
n-nonanol 239.66
cyclohexanol 1110.75
benzyl alcohol 520.58
2-ethylhexanol 515.44
isooctanol 240.35
dipropyl ether 843.6
1,2-dichlorobenzene 1087.91
ethyl lactate 241.53
propylene carbonate 1060.97
n-methylformamide 702.52
2-pentanol 774.03
n-pentane 218.47
1-propoxy-2-propanol 977.36
1-methoxy-2-propyl acetate 1502.3
2-(2-methoxypropoxy) propanol 605.13
mesitylene 509.2
ε-caprolactone 1767.72
p-cymene 276.11
epichlorohydrin 2655.14
1,1,1-trichloroethane 1949.98
2-aminoethanol 264.92
morpholine-4-carbaldehyde 1845.77
sulfolane 1423.81
2,2,4-trimethylpentane 103.94
2-methyltetrahydrofuran 3087.59
n-hexyl acetate 863.54
isooctane 89.32
2-(2-butoxyethoxy)ethanol 903.86
sec-butyl acetate 672.91
tert-butyl acetate 1374.36
decalin 153.67
glycerin 202.17
diglyme 1703.72
acrylic acid 393.99
isopropyl myristate 278.68
n-butyric acid 1157.11
acetyl acetate 1029.42
di(2-ethylhexyl) phthalate 256.27
ethyl propionate 749.78
nitromethane 1132.84
1,2-diethoxyethane 1595.93
benzonitrile 832.12
trioctyl phosphate 167.95
1-bromopropane 1558.26
gamma-valerolactone 2601.35
n-decanol 161.95
triethyl phosphate 295.08
4-methyl-2-pentanol 437.67
propionitrile 999.95
vinylene carbonate 992.29
1,1,2-trichlorotrifluoroethane 1036.84
DMS 715.31
cumene 290.3
2-octanol 185.2
2-hexanone 727.85
octyl acetate 340.95
limonene 452.77
1,2-dimethoxyethane 1344.4
ethyl orthosilicate 329.65
tributyl phosphate 254.33
diacetone alcohol 895.78
N,N-dimethylaniline 548.75
acrylonitrile 932.14
aniline 1194.58
1,3-propanediol 529.73
bromobenzene 1657.25
dibromomethane 1942.47
1,1,2,2-tetrachloroethane 2586.28
2-methyl-cyclohexyl acetate 589.38
tetrabutyl urea 278.3
diisobutyl methanol 275.23
2-phenylethanol 739.65
styrene 649.65
dioctyl adipate 387.46
dimethyl sulfate 547.21
ethyl butyrate 799.95
methyl lactate 335.49
butyl lactate 376.08
diethyl carbonate 481.91
propanediol butyl ether 414.15
triethyl orthoformate 545.71
p-tert-butyltoluene 292.99
methyl 4-tert-butylbenzoate 519.23
morpholine 3307.62
tert-butylamine 849.32
n-dodecanol 113.34
dimethoxymethane 1762.89
ethylene carbonate 932.17
cyrene 421.93
2-ethoxyethyl acetate 969.63
2-ethylhexyl acetate 1089.51
1,2,4-trichlorobenzene 1197.37
4-methylpyridine 2449.86
dibutyl ether 530.11
2,6-dimethyl-4-heptanol 275.23
DEF 1799.51
dimethyl isosorbide 1103.7
tetrachloroethylene 1606.71
eugenol 439.14
triacetin 642.82
span 80 479.62
1,4-butanediol 126.97
1,1-dichloroethane 2128.69
2-methyl-1-pentanol 526.16
methyl formate 492.69
2-methyl-1-butanol 889.93
n-decane 38.72
butyronitrile 1250.49
3,7-dimethyl-1-octanol 330.63
1-chlorooctane 233.81
1-chlorotetradecane 75.61
n-nonane 36.19
undecane 25.86
tert-butylcyclohexane 129.62
cyclooctane 149.23
cyclopentanol 782.76
tetrahydropyran 3649.96
tert-amyl methyl ether 1132.64
2,5,8-trioxanonane 959.38
1-hexene 605.09
2-isopropoxyethanol 458.02
2,2,2-trifluoroethanol 215.27
methyl butyrate 892.63

Scent© AI

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  • CAS NO.

    127-42-4

  • OLFACTIVE FAMILY

    Floral

  • BRAND

    Firmenich

Olfactory Pyramid

base

Notes

Woody
Floral
Sweet
Violet
Powdery

IFRA standard 51

Recommendation
Restriction / Specification
Maximum acceptable concentrations in the finished product (%)
Category 1
Products applied to the lips
 5.4 % Category 7A
Rinse-off products applied to the hair with some hand contact
 61 %
Category 2
Products applied to the axillae
 1.6 % Category 7B
Leave-on products applied to the hair with some hand contact
 61 %
Category 3
Products applied to the face/body using fingertips
 32 % Category 8
Products with significant anogenital exposure
 3.2 %
Category 4
Products related to fine fragrance
 30 % Category 9
Products with body and hand exposure, primarily rinse off
 59 %
Category 5A
Body lotion products applied to the body using the hands (palms), primarily leave on
 7.6 % Category 10A
Household care products with mostly hand contact
 100 %
Category 5B
Face moisturizer products applied to the face using the hands (palms), primarily leave on
 7.6 % Category 10B
Household care products with mostly hand contact, including aerosol/spray products (with potential leave-on skin contact)
 100 %
Category 5C
Hand cream products applied to the hands using the hands (palms), primarily leave on
 7.6 % Category 11A
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate without UV exposure
 100 %
Category 5D
Baby Creams, baby Oils and baby talc
 7.6 % Category 11B
Products with intended skin contact but minimal transfer of fragrance to skin from inert substrate with potential UV exposure
 100 %
Category 6
Products with oral and lip exposure
 18 % Category 12
Products not intended for direct skin contact, minimal or insignificant transfer to skin
 No restriction

Specification
Pseudo methyl ionones (CAS numbers 26651-96-7, 72968-25-3, 1117-41-5) should not be used as fragrance ingredient as such. A level of up to 2% of Pseudo methyl ionones as an impurity in Methyl ionones is accepted.

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  • You have 30 days from the date of receipt to initiate the return process.
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Certificates of Quality

  • Certificate of Analysis (COA)

    Provides information on the physical and chemical properties of the product.
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  • IFRA Certificate of Conformity

    Sets safety standards and guidelines for the product in manufacturing.
    Download  

  • Safety Data Sheet (SDS)

    Provides important safety guidelines for transporting, storing, and using the product.
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