105-68-0 Usage
Description
Isoamyl propionate, also known as a propanoate ester of isoamylol, is a clear colorless liquid with an apricot-pineapple odor. It has a somewhat harsh taste when freshly distilled but subsequently yields a pleasant apricot-plum, bittersweet flavor. It can be prepared by esterification of propionic acid with the isomeric amyl alcohols obtained from fusel oil and other sources.
Uses
Used in Perfumes:
Isoamyl propionate is used as a fragrance ingredient for its sweet, fruity, and slightly tropical aroma, providing a fresh and pleasant scent to perfumes.
Used in Flavors:
Isoamyl propionate is used as a flavoring agent for its apricot-plum, bittersweet taste, enhancing the flavor profiles of various food and beverage products.
Used in Lacquers:
Isoamyl propionate is used as a solvent in the manufacturing of lacquers, contributing to their drying properties and overall performance.
Isoamyl propionate is also reported to be found in various natural sources such as Bulgarian peppermint, cocoa, apple, melon, tomato, Camembert and Gruyere cheese, hop oil, beer, cognac, rum, cider, red and white wine, apple wine, and brandy, as well as cherimoya and custard apple.
Preparation
By esterification of propionic acid with the isomeric amyl alcohols obtained from fusel oil and other sources.
Hazard
Fire hazard.
Flammability and Explosibility
Flammable
Biochem/physiol Actions
Taste at 30 ppm
Metabolism
Esters such as propionates are hydrolysed to materials that are normally in the diet or are readily converted to such materials (Fassett, 1963a). The lower toxicities of the higher propionate esters (isoamyl < n-butyl < n-propyl < ethyl) and of the higher isoamyl esters (isovalerate < n-butyrate < propionate < acetate) were attributed to their slower rates of hydrolysis, which made less free alcohol available (Selisko, Ackermann & Kupke, 1962). The metabolism of propionic acid is known to proceed by conversion to succinic acid and oxidation through the citric acid cycle(Fassett, 1963b).
Check Digit Verification of cas no
The CAS Registry Mumber 105-68-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,0 and 5 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 105-68:
(5*1)+(4*0)+(3*5)+(2*6)+(1*8)=40
40 % 10 = 0
So 105-68-0 is a valid CAS Registry Number.
InChI:InChI=1/C8H16O2/c1-4-8(9)10-6-5-7(2)3/h7H,4-6H2,1-3H3
105-68-0Relevant articles and documents
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McHatton,Soulal
, p. 1337 (1953)
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Efficient Enzymatic Preparation of Flavor Esters in Water
Perdomo, Igor Chiarelli,Gianolio, Stefania,Pinto, Andrea,Romano, Diego,Contente, Martina Letizia,Paradisi, Francesca,Molinari, Francesco
, p. 6517 - 6522 (2019/06/20)
A straightforward biocatalytic method for the enzymatic preparation of different flavor esters starting from primary alcohols (e.g., isoamyl, n-hexyl, geranyl, cinnamyl, 2-phenethyl, and benzyl alcohols) and naturally available ethyl esters (e.g., formate, acetate, propionate, and butyrate) was developed. The biotransformations are catalyzed by an acyltransferase from Mycobacterium smegmatis (MsAcT) and proceeded with excellent yields (80-97%) and short reaction times (30-120 min), even when high substrate concentrations (up to 0.5 M) were used. This enzymatic strategy represents an efficient alternative to the application of lipases in organic solvents and a significant improvement compared with already known methods in terms of reduced use of organic solvents, paving the way to sustainable and efficient preparation of natural flavoring agents.
PROCESS FOR PRODUCTION OF DIALKYLTIN DIALKOXIDES
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Page/Page column 43, (2009/07/25)
An object of the present invention is to provide a process for producing a dialkyl tin compound from a composition of deactivated forms of a dialkyl tin catalyst, and to provide a process for producing the dialkyl tin catalyst from the dialkyl tin compound and using the dialkyl tin catalyst to produce a carbonic acid ester. According to the present invention, a process for producing a dialkyl tin compound is provided that subjects a composition of the deactivated forms of the dialkyl tin catalyst, formed when producing an ester compound, to an alkyl group redistribution reaction and/or dealkylation reaction.
