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

refractive index 

n20/D 1.476

FEMA 

3152 | 3-ETHYL-2-HYDROXY-2-CYCLOPENTEN-1-ONE

Flash point:

225 °F

storage temp. 

2-8°C

solubility 

soluble in Methanol,Ether

form 

powder to crystal

pka

9.17±0.20(Predicted)

color 

White to Orange to Green

Odor

at 1.00 % in propylene glycol. sweet caramel maple fenugreek

Odor Type

caramellic

JECFA Number

419

InChIKey

JHWFWLUAUPZUCP-UHFFFAOYSA-N

LogP

0.83

CAS DataBase Reference

21835-01-8(CAS DataBase Reference)

NIST Chemistry Reference

2-Cyclopenten-1-one, 3-ethyl-2-hydroxy-(21835-01-8)

EPA Substance Registry System

2-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

• Language:English Provider:SigmaAldrich

3-Ethyl-2-hydroxy-2-cyclopenten-1-one Usage And Synthesis

Chemical Properties

3-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.

Preparation

From 5-methyl-3,5-dicarbethoxy-2-cyclopen-ten-2-ol-one and phosphoric acid; by a patented process; also from dimethyl adipate.

Definition

ChEBI: 3-Ethyl-2-hydroxycyclopent-2-en-1-one is a cyclic ketone.

Aroma threshold values

Aroma characteristics at 0.5%: sweet, brown, caramellic, maple, brown sugar, rum, whiskey, furanone.

Taste threshold values

A 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 Description

3-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(21835-01-8)Related Product Information

• Ethylparaben
• Ethyl formate
• Ethyl acetate
• CHLOROPHOSPHONAZO III
• ISOXADIFEN-ETHYL
• 4'-Hydroxyacetophenone
• Ethanol
• Ethyl acrylate
• 2-Butanone oxime
• Ethyl pyruvate
• 2'-Hydroxyacetophenone
• Methyl cyclopentenolone
• Diethylene Glycol Monoethyl Ether
• Ethyl cyanoacetate
• 3-Ethyl-4-methyl-3-pyrrolin-2-one
• Ethylhexyl Triazone
• 2-Butanone
• Cyclopentene