3-Ethyl-2-hydroxy-2-cyclopenten-1-one solution - 50 wt. % in propylene glycol , CAS No.21835-01-8

CAS: 21835-01-8 Cat. No.: E432328 Molecular Weight: 126.15 EC Number: 244-606-5

GRADE & PURITY 50 wt. % in propylene glycol

Synonyms

CHEBI:184311 | Q27293841 | AS-64041 | 3-Ethyl-2-hydroxy-2-cyclopentenone | 2-Cyclopenten-1-one, 2-hydroxy-3-ethyl | 2-hydroxy-3-ethyl-2-cyclopentenone | Enol-3-Ethyl-1,2-cyclopentanedione | Ethylcyclotene | EN300-34056 | E0792 | SY053179 | 2-Hydroxy-3-eth

Storage

Store at 2-8°C

Shipped In

Wet ice

Overview

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.

Specifications

Synonyms

CHEBI:184311 | Q27293841 | AS-64041 | 3-Ethyl-2-hydroxy-2-cyclopentenone | 2-Cyclopenten-1-one, 2-hydroxy-3-ethyl | 2-hydroxy-3-ethyl-2-cyclopentenone | Enol-3-Ethyl-1, 2-cyclopentanedione | Ethylcyclotene | EN300-34056 | E0792 | SY053179 | 2-Hydroxy-3-eth

Specifications & Purity

50 wt. % in propylene glycol

Storage

Store at 2-8°C

Shipped In

Wet ice

This product requires cold chain shipping. Ground and other economy services are not available.

Names and Identifiers

• Canonical Smiles: CCC1=C(C(=O)CC1)O
• IUPAC Name: 3-ethyl-2-hydroxycyclopent-2-en-1-one
• InChIKey: JHWFWLUAUPZUCP-UHFFFAOYSA-N
• INCHI: 1S/C7H10O2/c1-2-5-3-4-6(8)7(5)9/h9H,2-4H2,1H3
• Isomeric SMILES: CCC1=C(C(=O)CC1)O
• WGK Germany: 3
• Molecular Weight: 126.15
• Reaxy-Rn: 970433
• Reaxys-RN_link_address: https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=970433&ln=

Taxonomic Classification

Taxonomy Tree

• Kingdom Organic compounds
  • Superclass Organic oxygen compounds
    • Class Organooxygen compounds
      • Subclass Carbonyl compounds
        • Level5 Ketones
          • Level6 Cyclic ketones

• Kingdom: Organic compounds
• Superclass: Organic oxygen compounds
• Class: Organooxygen compounds
• Subclass: Carbonyl compounds
• Intermediate Tree Nodes: Ketones
• Direct Parent: Cyclic ketones
• Alternative Parents: Enols Organic oxides Hydrocarbon derivatives
• Molecular Framework: Aliphatic homomonocyclic compounds
• Substituents: Cyclic ketone - Enol - Organic oxide - Hydrocarbon derivative - Aliphatic homomonocyclic compound
• Description: This compound belongs to the class of organic compounds known as cyclic ketones. These are organic compounds containing a ketone that is conjugated to a cyclic moiety.
• External Descriptors: Not available

Data sources

1. Djoumbou Feunang Y, Eisner R, Knox C, Chepelev L, Hastings J, Owen G, Fahy E, Steinbeck C, Subramanian S, Bolton E, Greiner R, and Wishart DS. ClassyFire: Automated Chemical Classification With A Comprehensive, Computable Taxonomy. Journal of Cheminformatics, 2016, 8:61.

DOI: 10.1186/s13321-016-0174-y

Chemical and Physical Properties

• Refractive Index: 1.476
• Flash Point(°F): 107 °C
• Flash Point(°C): 107°C
• Boil Point(°C): 75°C/0.3mmHg
• Melt Point(°C): 42°C
• Molecular Weight: 126.150 g/mol
• XLogP3: 0.700
• Hydrogen Bond Donor Count: 1
• Hydrogen Bond Acceptor Count: 2
• Rotatable Bond Count: 1
• Exact Mass: 126.068 Da
• Monoisotopic Mass: 126.068 Da
• Topological Polar Surface Area: 37.300 Ų
• Heavy Atom Count: 9
• Formal Charge: 0
• Complexity: 168.000
• Isotope Atom Count: 0
• Defined Atom Stereocenter Count: 0
• Undefined Atom Stereocenter Count: 0
• Defined Bond Stereocenter Count: 0
• Undefined Bond Stereocenter Count: 0
• The total count of all stereochemical bonds: 0
• Covalently-Bonded Unit Count: 1

References

1. Xiaoyun Zhao, Xuebin Zhao, Gaolei Xi, Lu Han, Bing Cui.  (2025)  Mechanistic Study on Ethanol-Induced Sweetness Enhancement: Combining Cellular and Computational Approaches to Uncover Its Dual Role as a Weak Agonist and Allosteric Stabilizer.  JOURNAL OF FOOD SCIENCE,  90  (11): (e70648).  [PMID:41178097] [10.1111/1750-3841.70648]