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Isoamyl alcohol[1]
Isoamyl alcohol.svg
Identifiers
CAS number 123-51-3 YesY
PubChem 31260
ChemSpider 29000 YesY
DrugBank DB02296
KEGG C07328 YesY
ChEBI CHEBI:15837 YesY
ChEMBL CHEMBL372396 YesY
Jmol-3D images Image 1
Properties
Molecular formula C5H12O
Molar mass 88.148 g/mol
Appearance Clear, colorless liquid
Density 0.8104 g/cm3 at 20 °C
Melting point −117.2 °C (−179.0 °F; 156.0 K)
Boiling point 131.1 °C (268.0 °F; 404.2 K)
Solubility in water slightly soluble, 28 g/L
Solubility very soluble in acetone, diethyl ether, ethanol
Viscosity 3.692 mPa·s
Thermochemistry
Specific
heat capacity
C
2.382 J·g-1·K-1
Std enthalpy of
formation
ΔfHo298
-356.4 kJ·mol-1 (liquid)
-300.7 kJ·mol-1 (gas)
Hazards
Flash point 43 °C (109 °F; 316 K)
Autoignition temperature 350 °C (662 °F; 623 K)
Explosive limits 1.2 – 9%
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
Infobox references

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's 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.[2]

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.[3]

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.[citation needed]

References[edit]

  1. ^ Lide, David R., ed. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 3–374, 5–42, 6–188, 8–102, 15–22. ISBN 0-8493-0487-3. 
  2. ^ Zumbo, P. "Phenol-chloroform Extraction". WEILL CORNELL MEDICAL COLLEGE P. ZUMBO LABORATORY OF CHRISTOPHER E. MASON, PH.D. Retrieved 19 June 2014. 
  3. ^ Green, Michael; Sambrook, Joseph. "Purification of Nucleic Acids: Extraction with Phenol-Chloroform". Molecular Cloning: A Laboratory Manual. Cold Spring Harbor Laboratory Press. ISBN 1936113422. 

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Isoamyl_alcohol — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.

13 news items

Ethanol Producer Magazine

Ethanol Producer Magazine
Tue, 14 Oct 2014 07:10:35 -0700

... list of VOCs from ethanol production has emerged, some common VOCs tested for include acetaldehyde, acetic acid, acetoin, acrolein, 2,3-butanediol, 2,3-butanedione, ethanol, ethyl acetate, formaldehyde, 2-furaldehyde, isoamyl alcohol and methanol.

Ars Technica

Ars Technica
Sat, 05 Jul 2014 05:00:00 -0700

... the samples "were thoroughly cleaned to remove surface contamination, ground into a buffer solution in a glass homogenizer then incubated for 2 h at 56ºC in a solution containing proteinase K before extraction with phenol/chloroform/isoamyl alcohol.
 
Nanowerk
Mon, 24 Feb 2014 03:23:50 -0800

Several compounds differed between cancer and normal cells, e.g., isoamyl alcohol was higher in melanoma cells than in normal melanocytes but isovaleric acid was lower in melanoma cells. These two compounds share the same precursor, viz., leucine.

Medical Daily

Medical Daily
Thu, 13 Jun 2013 20:26:48 -0700

In this case, the nanotube sensors were able to detect significant levels of airborne compounds associated with melanoma cells, like isoamyl alcohol, which typically has a sickeningly sweet smell in high concentrations, and dimethyl disulfide, which is ...
 
BioTechniques.com
Sat, 11 May 2013 04:03:45 -0700

After a single extraction, the majority of the free dye partitioned to the butanol phase; labeled and unlabeled DNA remained in the aqueous phase throughout the extraction process. We also tested another water-saturated solvent, isoamyl alcohol, and ...

separationsNOW.com

separationsNOW.com
Mon, 12 Aug 2013 07:48:45 -0700

After testing isoamyl alcohol, n-butanol, n-octanol and n-hexane, the first two solvents dissolved all ten additives with similar recoveries but n-butanol gave less HPLC interference so was chosen as the preferred solvent. The solution was adjusted to ...
 
Nature.com
Thu, 21 Jun 2012 16:37:30 -0700

A solution of 600 μl phenol:chloroform:isoamyl alcohol (25:24:1) was then added. The samples were subjected to pressure cycling at 35 000 psi for 20 s and 0 psi for 10 s for a total of 20 cycles using the Barocycler NEP3229 (Pressure Biosciences).
 
BioTechniques.com
Tue, 14 Feb 2012 13:18:30 -0800

... followed by RNA extraction with 200 µL phenol chloroform-isoamyl alcohol (Invitrogen). Approximately 2 µg of mRNA-enriched total RNA was immunoprecipitated by antibody-coupled beads. To estimate background binding, we subjected the same amount ...
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