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Isoamyl butyrate

  • Name Isoamyl butyrate
  • EINECS203-380-8
  • CAS No. 106-27-4
  • Density0.874 g/cm3
  • PSA26.30000
  • LogP2.37580
  • SolubilityHardly soluble in water, propylene glycol, glycerin, easily soluble in ethanol and diethyl ether
  • Melting Point-73 °C
  • FormulaC9H18O2
  • Boiling Point176.486 °C at 760 mmHg
  • Molecular Weight158.241
  • Flash Point57.778 °C
  • Transport InformationUN 3272 3/PG 3
  • Appearanceclear colourless liquid
  • Safety26-36/37/39-24/25
  • Risk Codes36/37/38
  • Molecular Structure
    Molecular Structure of 106-27-4 (Isoamyl butyrate)
  • Hazard SymbolsIrritantXi
  • SynonymsIrritantXi
  • Article Data27

Isoamyl butyrate Synthetic route

123-51-3

i-Amyl alcohol

107-92-6

butyric acid

106-27-4

isopentyl butanoate

Conditions
ConditionsYield
With Candida antarctica lipase B at 50℃; for 4h; Molecular sieve; Ionic liquid; Green chemistry; Enzymatic reaction;99.9%
copper methanesulfonate In cyclohexane at 130 - 135℃; for 2.5h;96%
With salicylic acid resin supported FeCl3 In benzene at 125℃; for 1.96667h;95.8%
106-31-0

butanoic acid anhydride

4237-74-5

isoamylmagnesium chloride

A

106-27-4

isopentyl butanoate

B

20809-46-5

7-methyl-4-octanone

Conditions
ConditionsYield
With diethyl ether
123-51-3

i-Amyl alcohol

37437-38-0

butyryl-sulfuric acid

A

106-27-4

isopentyl butanoate

B

50632-95-6

sulfuric acid mono-(3-methyl-butyl) ester

123-51-3

i-Amyl alcohol

123-20-6

vinyl n-butyrate

106-27-4

isopentyl butanoate

Conditions
ConditionsYield
With immobilized Burkholderia cepacia lipase In toluene at 44℃; for 3h; Kinetics; Reagent/catalyst; Green chemistry; Enzymatic reaction;
With polyvinyl alcohol : chitosan : lipase (Pseudomonas cepacia) 5:5:2.5 at 52℃; for 3h; Sonication; Enzymatic reaction;
123-51-3

i-Amyl alcohol

105-54-4

butanoic acid ethyl ester

106-27-4

isopentyl butanoate

Conditions
ConditionsYield
With recombinant acyltransferase from Mycobacterium smegmatis In aq. phosphate buffer at 25℃; for 24h; pH=8; Concentration; Green chemistry; Enzymatic reaction;

Isoamyl butyrate Consensus Reports

Reported in EPA TSCA Inventory.

Isoamyl butyrate Specification

The Isoamyl butyrate, with the CAS registry number 106-27-4, is also known as Butyric acid, isopentyl ester. It belongs to the product categories of Certified Natural Products Flavors and Fragrances; Alphabetical Listings; Flavors and Fragrances; I-L. Its EINECS number is 203-380-8. This chemical's molecular formula is C9H18O2 and molecular weight is 158.24. What's more, its systematic name is 3-Methylbutyl butyrate. Its classification code is Skin / Eye Irritant. This chemical should be sealed and stored in a cool and ventilated place. Moreover, it should be protected from oxides, heat and fire. It is widely used in the preparation of a variety of fruit juice flavor.

Physical properties of Isoamyl butyrate are: (1)ACD/LogP: 3.177; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 3.18; (4)ACD/LogD (pH 7.4): 3.18; (5)ACD/BCF (pH 5.5): 152.88; (6)ACD/BCF (pH 7.4): 152.88; (7)ACD/KOC (pH 5.5): 1273.99; (8)ACD/KOC (pH 7.4): 1273.99; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 6; (12)Polar Surface Area: 26.3 Å2; (13)Index of Refraction: 1.417; (14)Molar Refractivity: 45.478 cm3; (15)Molar Volume: 180.955 cm3; (16)Polarizability: 18.029×10-24cm3; (17)Surface Tension: 26.96 dyne/cm; (18)Density: 0.874 g/cm3; (19)Flash Point: 57.778 °C; (20)Enthalpy of Vaporization: 41.28 kJ/mol; (21)Boiling Point: 176.486 °C at 760 mmHg; (22)Vapour Pressure: 1.09 mmHg at 25°C.

Preparation of Isoamyl butyrate: this chemical can be prepared by butyric acid and 3-methyl-butan-1-ol by heating. This reaction will need reagent DOOl-AlCl3 superacid resin with the reaction time of 4.7 hours. The yield is about 93%.

Isoamyl butyrate can be prepared by butyric acid and 3-methyl-butan-1-ol by heating

When you are using this chemical, please be cautious about it as the following:
This chemical is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need to wear suitable protective clothing, gloves and eye/face protection and must avoid contact with eyes.

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(OCCC(C)C)CCC
(2)Std. InChI: InChI=1S/C9H18O2/c1-4-5-9(10)11-7-6-8(2)3/h8H,4-7H2,1-3H3
(3)Std. InChIKey: PQLMXFQTAMDXIZ-UHFFFAOYSA-N

The toxicity data is as follows:  

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rabbit LD50 skin > 5gm/kg (5000mg/kg)   Food and Cosmetics Toxicology. Vol. 17, Pg. 823, 1979.
rat LD50 oral > 5gm/kg (5000mg/kg)   Food and Cosmetics Toxicology. Vol. 17, Pg. 823, 1979.

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