Ethyl Cyclopentenolone

Product Name:

Ethyl cyclopentenolone

CAS:

21835-01-8

MF:

C7H10O2

MW:

126.15

EINECS:

244-606-5

Mol File:

21835-01-8.mol

Melting point 

39.0 to 43.0 °C

Boiling point 

75°C/0.3mmHg(lit.)

density 

1.067 g/mL 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

pka

9.17±0.20(Predicted)

JECFA Number

419

InChIKey

JHWFWLUAUPZUCP-UHFFFAOYSA-N

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)

Hazard Codes 

Xn,Xi

Risk Statements 

20/22-43

Safety Statements 

26-36-36/37

WGK Germany 

3

HS Code 

29144000

Chemical Properties

3-Ethyl-2-hydroxy-2-cyclopenten-1-one has a caramel-like flavor. This compound is often employed to impart a cara[1]mel 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.

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

Raw materials

Cyclopentene-->Dimethyl adipate