3-Ethyl-2-hydroxy-2-cyclopenten-1-one
Synonym(s):3-Ethylcyclopentan-1,2-dione
- CAS NO.：21835-01-8
- Empirical Formula: C7H10O2
- Molecular Weight: 126.15
- MDL number: MFCD00012391
- EINECS: 244-606-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-04-03 14:17:14
What is 3-Ethyl-2-hydroxy-2-cyclopenten-1-one?
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.
Properties of 3-Ethyl-2-hydroxy-2-cyclopenten-1-one
| Melting point: | 39.0 to 43.0 °C |
| Boiling point: | 75°C/0.3mmHg(lit.) |
| Density | 1.066 at 25 °C |
| refractive index | n |
| 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 |
| JECFA Number | 419 |
| 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 for 3-Ethyl-2-hydroxy-2-cyclopenten-1-one
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H317:Sensitisation, Skin |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P272:Contaminated work clothing should not be allowed out of the workplace. P280:Wear protective gloves/protective clothing/eye protection/face protection. P333+P313:IF SKIN irritation or rash occurs: Get medical advice/attention. P501:Dispose of contents/container to..… |
Computed Descriptors for 3-Ethyl-2-hydroxy-2-cyclopenten-1-one
| InChIKey | JHWFWLUAUPZUCP-UHFFFAOYSA-N |
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