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Skeletal formula of 1-pentanol
Ball and stick model of 1-pentanol
CAS number 71-41-0 YesY
PubChem 6276
ChemSpider 6040 YesY
UNII M9L931X26Y YesY
EC number 200-752-1
UN number 1105
KEGG C16834 N
MeSH n-Pentanol
ChEBI CHEBI:44884 YesY
RTECS number SB9800000
Beilstein Reference 1730975
Gmelin Reference 25922
Jmol-3D images Image 1
Molecular formula C5H12O
Molar mass 88.15 g mol−1
Density .811 g cm−3
Melting point −78 °C; −109 °F; 195 K
Boiling point 137 to 139 °C; 278 to 282 °F; 410 to 412 K
Solubility in water 22 g l−1
log P 1.348
Vapor pressure 200 Pa (at 20 °C)
Refractive index (nD) 1.409
heat capacity
207.45 J K−1 mol−1
Std molar
258.9 J K−1 mol−1
Std enthalpy of
−351.90–−351.34 kJ mol−1
Std enthalpy of
−3331.19–−3330.63 kJ mol−1
GHS pictograms The flame pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS) The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word WARNING
GHS hazard statements H226, H315, H332, H335
GHS precautionary statements P261
EU Index 603-200-00-1
EU classification Harmful Xn
R-phrases R10, R20, R37, R66
S-phrases (S1/2), S46
NFPA 704
Flammability code 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g., diesel fuel Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point 49 °C (120 °F; 322 K)
Related compounds
Related compounds Hexane


Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

1-Pentanol, (or n-pentanol, pentan-1-ol), is an alcohol with five carbon atoms and the molecular formula C5H12O.[2] 1-Pentanol is a colorless liquid with an unpleasant aroma. There are 8 alcohols with this molecular formula (see amyl alcohol). The ester formed from butyric acid and 1-pentanol, pentyl butyrate, smells like apricot. The ester formed from acetic acid and 1-pentanol, amyl acetate (pentyl acetate), smells like banana.

Pentanol can be prepared by fractional distillation of fusel oil. To reduce the use of fossil fuels, research is underway to discover cost-effective methods of utilizing fermentation to produce Bio-Pentanol. Pentanol can be used as a solvent for coating CDs and DVDs. Another use is a replacement for gasoline.


  1. ^ "n-pentanol - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 26 March 2005. Identification and Related Records. Retrieved 10 October 2011. 
  2. ^ CRC Handbook of Chemistry and Physics 65Th Ed.