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2-Methyl-2-Pentenoic Acid Aroma Chemical
CAS# 3142-72-1

Fruity, Green, Sweet, Caramellic, Cheesy

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2-Methyl-2-Pentenoic Acid (CAS 3142-72-1) is an unsaturated short-chain carboxylic acid. In its pure form, it appears as a liquid or soft waxy solid with a sharp, pungent odour typical of low-molecular-weight unsaturated acids, clearly perceptible even at very low concentrations. Because of its high odour intensity, it is generally used sparingly, primarily as a nuance modifier in fragrance and flavour compositions.

In perfumery, 2-Methyl-2-Pentenoic Acid is employed at trace levels to introduce subtle “dirty” effects with facets of sweat, cheese, sour-salty or delicately fermented notes. It is especially useful in animalic and leather accords, alcoholic beverage notes, fermented food accords, and overripe fruit effects. When carefully balanced within a complex base, it can significantly increase the realism of gourmand, dairy, smoked meat or savoury snack themes and add depth that is difficult to obtain using only “clean” aroma materials.

In flavour applications, 2-Methyl-2-Pentenoic Acid is used as a specialised impact material or blender to reproduce or reinforce cheese, butter, yogurt, processed meat and sauce profiles, always within the regulatory limits set by each jurisdiction. Due to its very strong and easily dominating character, it is typically pre-diluted before use and should be handled by experienced flavourists or formulation technologists to achieve the desired effect without overwhelming the end product.

Technical standards

Solubility @25˚C

Solvent Solubility (g/L)
ethanol 635.78
methanol 823.41
isopropanol 594.26
water 13.27
ethyl acetate 147.93
n-propanol 478.84
acetone 259.51
n-butanol 409.04
acetonitrile 205.4
DMF 641.22
toluene 63.57
isobutanol 382.1
1,4-dioxane 597.01
methyl acetate 201.9
THF 592.66
2-butanone 232.68
n-pentanol 376.54
sec-butanol 438.1
n-hexane 47.34
ethylene glycol 218.66
NMP 494.66
cyclohexane 21.3
DMSO 579.69
n-butyl acetate 183.83
n-octanol 205.23
chloroform 262.24
n-propyl acetate 121.49
acetic acid 267.71
dichloromethane 222.62
cyclohexanone 264.27
propylene glycol 240.35
isopropyl acetate 115.13
DMAc 324.44
2-ethoxyethanol 409.42
isopentanol 336.15
n-heptane 19.74
ethyl formate 135.08
1,2-dichloroethane 185.38
n-hexanol 388.82
2-methoxyethanol 539.75
isobutyl acetate 93.7
tetrachloromethane 68.11
n-pentyl acetate 147.0
transcutol 651.62
n-heptanol 220.39
ethylbenzene 67.02
MIBK 160.8
2-propoxyethanol 493.25
tert-butanol 661.44
MTBE 377.33
2-butoxyethanol 310.05
propionic acid 251.06
o-xylene 78.64
formic acid 204.91
diethyl ether 224.33
m-xylene 77.3
p-xylene 80.72
chlorobenzene 106.93
dimethyl carbonate 58.5
n-octane 14.98
formamide 206.51
cyclopentanone 358.17
2-pentanone 194.46
anisole 150.76
cyclopentyl methyl ether 241.98
gamma-butyrolactone 402.41
1-methoxy-2-propanol 451.18
pyridine 179.98
3-pentanone 117.17
furfural 307.34
n-dodecane 15.06
diethylene glycol 366.12
diisopropyl ether 85.63
tert-amyl alcohol 540.67
acetylacetone 168.46
n-hexadecane 16.33
acetophenone 122.64
methyl propionate 134.71
isopentyl acetate 182.38
trichloroethylene 287.31
n-nonanol 170.4
cyclohexanol 236.35
benzyl alcohol 153.93
2-ethylhexanol 187.08
isooctanol 180.02
dipropyl ether 109.93
1,2-dichlorobenzene 110.04
ethyl lactate 89.51
propylene carbonate 191.75
n-methylformamide 304.26
2-pentanol 311.6
n-pentane 32.26
1-propoxy-2-propanol 294.76
1-methoxy-2-propyl acetate 164.03
2-(2-methoxypropoxy) propanol 209.55
mesitylene 59.8
ε-caprolactone 252.79
p-cymene 52.02
epichlorohydrin 399.56
1,1,1-trichloroethane 166.42
2-aminoethanol 381.11
morpholine-4-carbaldehyde 417.18
sulfolane 550.46
2,2,4-trimethylpentane 30.62
2-methyltetrahydrofuran 431.69
n-hexyl acetate 222.0
isooctane 27.9
2-(2-butoxyethoxy)ethanol 325.38
sec-butyl acetate 95.98
tert-butyl acetate 175.17
decalin 25.61
glycerin 258.99
diglyme 417.56
acrylic acid 202.29
isopropyl myristate 88.41
n-butyric acid 265.1
acetyl acetate 69.27
di(2-ethylhexyl) phthalate 86.92
ethyl propionate 98.7
nitromethane 305.35
1,2-diethoxyethane 203.14
benzonitrile 144.16
trioctyl phosphate 79.49
1-bromopropane 135.0
gamma-valerolactone 425.54
n-decanol 132.86
triethyl phosphate 56.7
4-methyl-2-pentanol 188.45
propionitrile 188.61
vinylene carbonate 164.14
1,1,2-trichlorotrifluoroethane 253.85
DMS 105.99
cumene 64.0
2-octanol 166.76
2-hexanone 170.55
octyl acetate 124.41
limonene 76.38
1,2-dimethoxyethane 453.62
ethyl orthosilicate 61.66
tributyl phosphate 78.22
diacetone alcohol 273.79
N,N-dimethylaniline 126.11
acrylonitrile 208.44
aniline 128.82
1,3-propanediol 401.54
bromobenzene 85.02
dibromomethane 165.54
1,1,2,2-tetrachloroethane 270.02
2-methyl-cyclohexyl acetate 107.86
tetrabutyl urea 102.75
diisobutyl methanol 107.27
2-phenylethanol 185.06
styrene 69.78
dioctyl adipate 96.92
dimethyl sulfate 120.79
ethyl butyrate 99.7
methyl lactate 120.64
butyl lactate 126.92
diethyl carbonate 62.78
propanediol butyl ether 270.74
triethyl orthoformate 75.68
p-tert-butyltoluene 56.52
methyl 4-tert-butylbenzoate 157.74
morpholine 584.37
tert-butylamine 400.19
n-dodecanol 99.33
dimethoxymethane 282.58
ethylene carbonate 130.52
cyrene 178.08
2-ethoxyethyl acetate 173.19
2-ethylhexyl acetate 136.51
1,2,4-trichlorobenzene 127.7
4-methylpyridine 208.85
dibutyl ether 114.19
2,6-dimethyl-4-heptanol 107.27
DEF 223.86
dimethyl isosorbide 288.36
tetrachloroethylene 190.19
eugenol 185.3
triacetin 119.85
span 80 199.6
1,4-butanediol 260.27
1,1-dichloroethane 206.1
2-methyl-1-pentanol 315.56
methyl formate 192.36
2-methyl-1-butanol 331.15
n-decane 23.88
butyronitrile 211.72
3,7-dimethyl-1-octanol 167.58
1-chlorooctane 94.99
1-chlorotetradecane 39.22
n-nonane 23.11
undecane 18.51
tert-butylcyclohexane 35.52
cyclooctane 10.77
cyclopentanol 339.42
tetrahydropyran 365.67
tert-amyl methyl ether 256.3
2,5,8-trioxanonane 309.23
1-hexene 148.98
2-isopropoxyethanol 305.99
2,2,2-trifluoroethanol 106.48
methyl butyrate 140.38

Scent© AI

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  • CAS NO.

    3142-72-1

  • OLFACTIVE FAMILY

    Fruity

  • BRAND

    Scent.vn

Olfactory Pyramid

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IFRA standard 51

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

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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.
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  • Safety Data Sheet (SDS)

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