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3-Ethyl-2-hydroxy-2-cyclopenten-1-one

3-Ethyl-2-hydroxy-2-cyclopenten-1-one Basic information
Product Name:3-Ethyl-2-hydroxy-2-cyclopenten-1-one
Synonyms:2-Cyclopenten-1-one, 3-ethyl-2-hydroxy-;2-Cyclopenten-1-one,3-ethyl-2-hydroxy-(7CI,8CI,9CI);3-ethyl-2-hydroxy-2-cyclopenten-1-on;3-ETHYL-HYDROXY-2-CYCLOPENTEN-1-ONE;3-ETHYL-2-HYDROXY-2-CYCLOPENTEN-1-ONE;3-ETHYL-2-CYCLPENTEN-2-OL-1-ONE;3-Ethyl-2-hydroxy-2-cyclopenten-1-one solution;3-ethyl-2-hydroxycyclopent-2-en-1-one
CAS:21835-01-8
MF:C7H10O2
MW:126.15
EINECS:244-606-5
Product Categories:C7 to C8;Carbonyl Compounds;Ketones;Alphabetical Listings;E-F;Flavors and Fragrances;pharmacetical
Mol File:21835-01-8.mol
3-Ethyl-2-hydroxy-2-cyclopenten-1-one Structure
3-Ethyl-2-hydroxy-2-cyclopenten-1-one Chemical Properties
Melting point 39.0 to 43.0 °C
Boiling point 75°C/0.3mmHg(lit.)
density 1.066 at 25 °C
FEMA 3152 | 3-ETHYL-2-HYDROXY-2-CYCLOPENTEN-1-ONE
refractive index n20/D 1.476
Fp 225 °F
storage temp. 2-8°C
solubility soluble in Methanol,Ether
form powder to crystal
pka9.17±0.20(Predicted)
color White to Orange to Green
Odorat 1.00 % in propylene glycol. sweet caramel maple fenugreek
Odor Typecaramellic
JECFA Number419
InChIKeyJHWFWLUAUPZUCP-UHFFFAOYSA-N
LogP0.83
CAS DataBase Reference21835-01-8(CAS DataBase Reference)
NIST Chemistry Reference2-Cyclopenten-1-one, 3-ethyl-2-hydroxy-(21835-01-8)
EPA Substance Registry System2-Cyclopenten-1-one, 3-ethyl-2-hydroxy- (21835-01-8)
Safety Information
Hazard Codes Xn,Xi
Risk Statements 20/22-43
Safety Statements 26-36-36/37
WGK Germany 3
HS Code 29144000
MSDS Information
ProviderLanguage
SigmaAldrich English
3-Ethyl-2-hydroxy-2-cyclopenten-1-one Usage And Synthesis
Chemical Properties3-Ethyl-2-hydroxy-2-cyclopenten-1-one has a caramel-like flavor. This compound is often employed to impart a caramel flavor or coconut notes in food. The compound exhibits flavor-enhancing characteristics.
PreparationFrom 5-methyl-3,5-dicarbethoxy-2-cyclopen-ten-2-ol-one and phosphoric acid; by a patented process; also from dimethyl adipate.
DefinitionChEBI: 3-Ethyl-2-hydroxycyclopent-2-en-1-one is a cyclic ketone.
Aroma threshold valuesAroma characteristics at 0.5%: sweet, brown, caramellic, maple, brown sugar, rum, whiskey, furanone.
Taste threshold valuesA threshold value of 5 ppm, similar to the 3-methyl analog, has been determined by comparative sensory evaluation. Taste characteristics at 12 ppm: sweet, jamy, fruity, brown, toasted, maple, nutty
General Description3-Ethyl-2-hydroxy-2-cyclopenten-1-one is formed by thermal degradation of ascorbic acid. It is an aroma compound formed from the reactions of L-ascorbic acid with L-threonine/L-serine at different pH values.
3-Ethyl-2-hydroxy-2-cyclopenten-1-one Preparation Products And Raw materials
Raw materialsCyclopentene-->Dimethyl adipate
Ethylhexyl Triazone 3-CYCLOHEXYLMETHYL-2-HYDROXYCYCLOPENT-2-ENONE Methyl cyclopentenolone 3-(3,7-DIMETHYLOCTYL)-2-HYDROXYCYCLOPENT-2-ENONE 3-BENZYL-2-HYDROXYCYCLOPENT-2-ENONE 3-ethyl-2-hydroxy-4-methylcyclopent-2-en-1-one Ethyl pyruvate Diethylene Glycol Monoethyl Ether 3-Ethyl-2-hydroxy-2-cyclopenten-1-one 3-(2,6-DIMETHYLHEPTYL)-2-HYDROXY-4,4-DIMETHYLCYCLOPENT-2-ENONE ISOXADIFEN-ETHYL Cyclopentene 2'-Hydroxyacetophenone Isovaleric acid CHLOROPHOSPHONAZO III 2-HYDROXY-4,4-DIMETHYL-3-NONYLCYCLOPENT-2-ENONE 3-DECYL-2-HYDROXYCYCLOPENT-2-ENONE 3-CYCLOHEXYL-2-HYDROXY-4,4-DIMETHYLCYCLOPENT-2-ENONE
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