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705-86-2 Usage

Chemical Properties

Different sources of media describe the Chemical Properties of 705-86-2 differently. You can refer to the following data:
1. 5-Decanolide is a flavor constituent of many types of fruit, cheese, and other dairy products. It is a colorless, viscous liquid with a creamy-coconut, peach-like aroma.
2. δ-Decalactone has an oily, peach odor and taste.


Reported found in rum, coconut, raspberry, apricot, bilberry, peach, strawberry, Swiss cheese, other cheeses, butter, milk, milk powder, mutton fat, mango and nectarine.


Used in pharmaceutical preparations, feed additive, flavorings agent. Also used by food and flavor industries for its coconut fragrance and taste. It is also used as a reagent in the synthesis of (±)-Massoilactone (M197600); a chemical component with antibacterial activity found in volatile oils.


δ-Decalactone can be prepared by peracid oxidation of 2-pentylcyclopentanone. (R)-δ-decalactone is obtained in high optical purity by starting from (R)-2- pentylcyclopentanone . Hydrogenation or fermentation of massoia lactone is also a practicable method to produce this enantiomer. A newer development for the preparation ofδ-decalactone describes a carboxylation of 1-nonen-4-ol with carbon monoxide in the presence of a homogenous palladium catalyst in an aqueous system.


ChEBI: A delta-lactone that is 5-valerolactone substituted by a pentyl group at position 6.

Aroma threshold values

Detection: 100 ppb

Taste threshold values

Taste characteristics at 2 ppm: waxy, coconut, lactonic, fatty, creamy, nutty and fruity.

Synthesis Reference(s)

The Journal of Organic Chemistry, 55, p. 462, 1990 DOI: 10.1021/jo00289a016

General Description

Measurement of optical rotatory dispersion and circular dichroism of (+) 5-decanolide (tetrahydro-6-pentyl-2H-pyran-2-one) has been reported.

Flammability and Explosibility



From hexylethylene oxide and sodium malonic ester; also from decanoic acid.

Check Digit Verification of cas no

The CAS Registry Mumber 705-86-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 7,0 and 5 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 705-86:
72 % 10 = 2
So 705-86-2 is a valid CAS Registry Number.

705-86-2 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • Alfa Aesar

  • (A11756)  delta-Decanolactone, 97%   

  • 705-86-2

  • 25g

  • 840.0CNY

  • Detail
  • Alfa Aesar

  • (A11756)  delta-Decanolactone, 97%   

  • 705-86-2

  • 50g

  • 996.0CNY

  • Detail
  • Alfa Aesar

  • (A11756)  delta-Decanolactone, 97%   

  • 705-86-2

  • 100g

  • 1844.0CNY

  • Detail
  • Alfa Aesar

  • (A11756)  delta-Decanolactone, 97%   

  • 705-86-2

  • 500g

  • 6659.0CNY

  • Detail
  • Aldrich

  • (298069)  5-Decanolide  ≥98%

  • 705-86-2

  • 298069-100ML

  • 1,297.53CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name 6-pentyloxan-2-one

1.2 Other means of identification

Product number -
Other names 2H-Pyran-2-one, tetrahydro-6-pentyl-

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Fragrances
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:705-86-2 SDS

705-86-2Relevant articles and documents


Winter et al.

, p. 1250,1255 (1962)


Synthesis process of natural delta-decalactone


, (2022/01/10)

The invention relates to a synthesis process of natural delta-decalactone, and belongs to the technical field of food additives, and the natural delta-decalactone is obtained by taking furfural and n-amyl alcohol as raw materials through chlorination, Grignard coupling, Piancatelli rearrangement, hydrogenation and oxidation. The purity of the delta-decalactone prepared in the synthesis process of the natural delta-decalactone can reach 98% or above, the natural degree detected by isotope mass spectrometry C14 is 95% or above, and the problems that the synthesis route of the delta-decalactone is complex and the yield is low are solved; and the experimental method is simple, convenient and feasible, the reaction condition is mild, the experimental condition is easy to realize and control, and the method has the characteristics that the raw materials are easy to obtain and rich in source, the yield is relatively high, the used catalyst can be repeatedly used and the like.

Regio- and Enantio-selective Chemo-enzymatic C?H-Lactonization of Decanoic Acid to (S)-δ-Decalactone

Manning, Jack,Tavanti, Michele,Porter, Joanne L.,Kress, Nico,De Visser, Sam P.,Turner, Nicholas J.,Flitsch, Sabine L.

supporting information, p. 5668 - 5671 (2019/03/29)

The conversion of saturated fatty acids to high value chiral hydroxy-acids and lactones poses a number of synthetic challenges: the activation of unreactive C?H bonds and the need for regio- and stereoselectivity. Here the first example of a wild-type cytochrome P450 monooxygenase (CYP116B46 from Tepidiphilus thermophilus) capable of enantio- and regioselective C5 hydroxylation of decanoic acid 1 to (S)-5-hydroxydecanoic acid 2 is reported. Subsequent lactonization yields (S)-δ-decalactone 3, a high value fragrance compound, with greater than 90 % ee. Docking studies provide a rationale for the high regio- and enantioselectivity of the reaction.

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