Amyl acetate

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Amyl acetate
Wireframe model of amyl acetate
Ball-and-stick model of the amyl acetate molecule
Preferred IUPAC name
Pentyl acetate
Other names
  • Acetic acid n-amyl ester
  • Acetic acid pentyl ester
  • n-Amyl acetate
  • Amyl ethanoate
  • Pear oil
  • Pentyl ethanoate
  • Amyl acetic ester[1]
  • Amyl acetic ether[1]
  • 1-Pentanol acetate[1]
3D model (JSmol)
ECHA InfoCard 100.010.044
EC Number
  • 211-047-3
MeSH Amyl+acetate
RTECS number
  • AJ1925000
UN number UN 1104
Molar mass 130.19 g/mol
Appearance Colorless liquid
Odor Pear-like smell
Density 0.876 g/cm3
Melting point −71 °C (−96 °F; 202 K)
Boiling point 149 °C (300 °F; 422 K)
Solubility in other solvents Water: 10 g/l (20 °C)
Vapor pressure 4 mmHg[1]
−89.06·10−6 cm3/mol
Main hazards Flammable
Safety data sheet External MSDS
NFPA 704 (fire diamond)
Flammability code 3: Liquids and solids that can be ignited under almost all ambient temperature conditions. Flash point between 23 and 38 °C (73 and 100 °F). E.g. gasolineHealth code 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineReactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no codeNFPA 704 four-colored diamond
Flash point −70.6 °C (−95.1 °F; 202.6 K)
Explosive limits 1.1–7.5%[1]
Lethal dose or concentration (LD, LC):
7400 mg/kg, oral (rabbit)
6500 mg/kg, oral (rat)[2]
5200 ppm (rat)[2]
NIOSH (US health exposure limits):
PEL (Permissible)
100 ppm, 8 hr TWA (525 mg/m3)[1]
REL (Recommended)
TWA 100 ppm (525 mg/m3)[1]
IDLH (Immediate danger)
1000 ppm[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Amyl acetate (pentyl acetate) is an organic compound and an ester with the chemical formula CH3COO[CH2]4CH3 and the molecular weight 130.19 g/mol. It has a scent similar to pears[3] and apples.[4] The compound is the condensation product of acetic acid and 1-pentanol. However, esters formed from other pentanol isomers (amyl alcohols), or mixtures of pentanols, are often referred to as amyl acetate.


It is used as a flavoring agent, as a paint and lacquer solvent, and in the preparation of penicillin.

It is an inactive ingredient in liquid bandages.[5]

It is used as a fuel in the Hefner lamp.

See also[edit]


  1. ^ a b c d e f g h NIOSH Pocket Guide to Chemical Hazards. "#0031". National Institute for Occupational Safety and Health (NIOSH).
  2. ^ a b "n-Amyl acetate". National Institute for Occupational Safety and Health (NIOSH). 4 December 2014. Retrieved 16 February 2015.
  3. ^ Stark, Norman (1975). The Formula Book. New York: Sheed and Ward. p. 28. ISBN 0-8362-0630-4.
  4. ^ Thickett, Geoffrey (2006). Chemistry 2: HSC Course. Milton, Queensland, Australia: John Wiley & Sons. p. 227. ISBN 978-0-7314-0415-5.
  5. ^ "New-Skin® Liquid Bandage—Inactive Ingredients". new-skin. Retrieved July 4, 2017.