Isoamyl alcohol (also known as isopentyl alcohol) is a clear, colorless alcohol with the formula (CH3)2CHCH2CH2OH. It is one of several isomers of amyl alcohol. It is a main ingredient in the production of banana oil, an ester found in nature and also produced as a flavouring in industry. It is also the main ingredient of Kovac's reagent, used for the bacterial diagnostic indole test.
It is also used as an antifoaming agent in the Chloroform:Isomyl Alcohol reagent.
Isoamyl alcohol is used in a phenol–chloroform extraction mixed with the chloroform to further inhibit RNase activity and prevent solubility of RNAs with long tracts of poly-adenine.
It is one of the components of the aroma of Tuber melanosporum, the black truffle. It has been identified as a chemical in the pheromone used by hornets to attract other members of the hive to attack.
Chinese alias: 3- methyl -1- butanol, isobutanol; 3- methyl -1- butanol;
English Name: isoamylol
English aliases: 3-Methyl-1-butanol; Isopentyl 3-methyl-2-butenoate; Isoamyl senecioate; 3-methylbutyl alcohol; 3-Methyl-2-butenoic acid, 3-methylbutyl ester;
Molecular formula: C5H12O
Molecular weight: 88.14820
Precise quality: 88.08880
Appearance and character: colorless liquid
Density: 0.809 g/mL at 25 degree C (lit.)
Melting point: -117 degree C
Boiling point: 131-132 degrees C
Flash point: 109.4 degree F
Refractive index: n20/D 1.407
Water solubility: 25 g/L (20 C)
Stability: Stable. Flammable. Incompatible with strong oxidizing agents, strong acids, acid chlorides, acid anhydrides.
Storage conditions: warehouse ventilation, low temperature drying, separate from oxidizer.
Steam pressure: 4.16mmHg at 25 degree C
Steam density: 3 (vs air)
Signal word: warning
Hazard statement: H226; H315; H319; H332; H335
Cautionary statement: P210; P261; P280; P304 + P340 + P312; P337 + P313; P403 + P235
Package level: II
Risk category: 3
Customs Code: 2905199090
Dangerous goods transportation Code: UN 1105 3/PG 3
Danger category code: R10; R20/22
Safety instructions: S46-S16
Dangerous goods sign: Xn
Used in the manufacture of perfumes, medicine and photographic drugs, and also as solvents.