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Names | |
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Preferred IUPAC name
3-Methylbutyl acetate | |
Systematic IUPAC name
3-Methylbutyl ethanoate | |
Other names
Isopentyl acetate
Isopentyl ethanoate Isoamyl acetate Banana oil Pear essence | |
Identifiers | |
3D model (JSmol)
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1744750 | |
ChEBI | |
ChEMBL | |
ChemSpider | |
ECHA InfoCard | 100.004.240 |
EC Number |
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101452 | |
KEGG | |
PubChem CID
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RTECS number |
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UNII | |
UN number | 1104 1993 |
CompTox Dashboard (EPA)
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Properties | |
C7H14O2 | |
Molar mass | 130.187 g·mol−1 |
Appearance | Colorless liquid |
Odor | Banana-like[1] |
Density | 0.876 g/cm3 |
Melting point | −78 °C (−108 °F; 195 K) |
Boiling point | 142 °C (288 °F; 415 K) |
0.3% (20 °C)[1] | |
Vapor pressure | 4 mmHg or 0.533 kPa (20 °C)[1] |
−89.4·10−6 cm3/mol | |
Refractive index (nD)
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1.4020 at 20° |
Hazards | |
GHS labelling: | |
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Danger | |
H226, H315, H319, H335, H336, H372 | |
P210, P233, P240, P241, P242, P243, P260, P261, P264, P270, P271, P280, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P312, P314, P321, P332+P313, P337+P313, P362, P370+P378, P403+P233, P403+P235, P405, P501 | |
NFPA 704 (fire diamond) | |
Flash point | 25 °C (77 °F; 298 K) |
Explosive limits | 1.0% (100 °C) – 7.5%[1] |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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7422 mg/kg (rabbit, oral) 16,600 mg/kg (rat, oral)[2] |
LCLo (lowest published)
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6470 ppm (cat)[2] |
NIOSH (US health exposure limits): | |
PEL (Permissible)
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TWA 100 ppm (525 mg/m3)[1] |
REL (Recommended)
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TWA 100 ppm (525 mg/m3)[1] |
IDLH (Immediate danger)
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1000 ppm[1] |
Related compounds | |
Related compounds
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Isoamyl formate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Isoamyl acetate, also known as isopentyl acetate, is an ester formed from isoamyl alcohol and acetic acid, with the molecular formula C7H14O2. It is a colorless liquid that is only slightly soluble in water, but very soluble in most organic solvents. Isoamyl acetate has a strong odor which is described as similar to both banana and pear.[3] Pure isoamyl acetate, or mixtures of isoamyl acetate, amyl acetate, and other flavors in ethanol may be referred to as banana oil[4] or pear oil.[5]