Description

3-Methyl-2-cyclopenten-1-one (CAS No. 2758-18-1) is a high-purity cyclic enone compound with the molecular formula C₆H₈O. This versatile organic intermediate features a reactive α,β-unsaturated carbonyl structure, making it valuable for synthetic organic chemistry applications. The compound presents as a clear to pale yellow liquid with a characteristic ketone odor, and is typically supplied with ≥98% purity (GC analysis).

Our product is rigorously tested for quality parameters including water content, residual solvents, and heavy metals to meet research-grade standards. Proper storage in amber glass bottles under inert atmosphere at 2-8°C is recommended to maintain stability. Suitable for use in:

• Pharmaceutical intermediate synthesis
• Flavor and fragrance applications
• Organic synthesis building block
• Material science research

Available in convenient quantities from 1g to 1kg with customizable packaging options. Technical data sheet and certificates of analysis provided with every order.

Properties

• CAS Number: 2758-18-1
• Complexity: 122
• IUPAC Name: 3-methylcyclopent-2-en-1-one
• InChI: InChI=1S/C6H8O/c1-5-2-3-6(7)4-5/h4H,2-3H2,1H3
• InChI Key: CHCCBPDEADMNCI-UHFFFAOYSA-N
• Exact Mass: 96.057514874
• Molecular Formula: C6H8O
• Molecular Weight: 96.13
• SMILES: CC1=CC(=O)CC1
• Topological: 17.1
• Monoisotopic Mass: 96.057514874
• Physical Description: Pale straw-coloured liquid; warm-spicy, sweet-floral and diffusive yet quite tenaceous odour
• Solubility: soluble in water; soluble in oil
• Density: 0.968-0.975
• Refractive Index: 1.485-1.491
• Synonyms: 3-METHYL-2-CYCLOPENTEN-1-ONE, 3-methylcyclopent-2-en-1-one, 3-Methylcyclopent-2-enone, 2-Cyclopenten-1-one, 3-methyl-, 3-Methyl-2-cyclopentenone, 1-Methyl-1-cyclopenten-3-one, FEMA No. 3435, UNII-6V7RSW7273, NUSSOL, 6V7RSW7273, EINECS 220-421-5, DTXSID1062629, FEMA 3435, 1-METHYL-1-CYCLOPENTEN-3-ONE [FHFI], DTXCID6037699, chccbpdeadmnci-uhfffaoysa-n, inchi=1/c6h8o/c1-5-2-3-6(7)4-5/h4h,2-3h2,1h, 2758-18-1, MFCD00001403, 3-methylcyclopentenone, 3-methyl-2cyclopenten-1-one, SCHEMBL124557, CHEMBL290007, 98% stabilized 0.1 % HQ, SCHEMBL10471629, SCHEMBL10547859, 3-methyl-cyclopent-2-en-1-one, CHEBI:179528, 3-Methyl-2-cyclopentenone, 97%, STR02311, AKOS000119905, AKOS025243231, CS-W013730, HY-W013014, SB40535, 2-CYCLOPENTEN-1-ONE,3-METHYL-, FM142340, PD158302, 3-Methyl-2-cyclopenten-1-one, 97%, FG, DB-003410, DB-152169, M0956, NS00021980, EN300-19779, 3-Methyl-2-cyclopentenone, analytical standard, H10654, Q27265577, 134014-04-3

Application

3-Methyl-2-cyclopenten-1-one serves as a key intermediate in the synthesis of various flavor compounds and pharmaceutical precursors. Researchers utilize this cyclic enone in Diels-Alder reactions and Michael additions due to its reactive conjugated system. The compound finds particular utility in fragrance chemistry for creating woody and amber notes. It also functions as a building block for more complex cyclic structures in medicinal chemistry applications.

Safety and Hazards

GHS Hazard Statements

• H227 (20%): Combustible liquid [Warning Flammable liquids]
• H315 (100%): Causes skin irritation [Warning Skin corrosion/irritation]
• H319 (100%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
• H335 (80%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]

Precautionary Statements

• P210, P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P370+P378, P403, P403+P233, P405, and P501

Hazard Classes and Categories

• Flam. Liq. 4 (20%)
• Skin Irrit. 2 (100%)
• Eye Irrit. 2A (100%)
• STOT SE 3 (80%)

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Disclaimer: Sold exclusively for laboratory research. Prohibited for commercial use, diagnostics, or human/animal applications. Buyers assume all compliance liability.