2-Cyclohexen-1-one
2-Cyclohexen-1-one (CAS: 930-68-7), a cyclic ketone with the molecular formula C6H8O, serves as a valuable intermediate in organic synthesis. Its structure, featuring an alpha, beta-unsaturated carbonyl system, makes it a reactive electrophile. This compound is widely utilized in the chemical industry for constructing more complex molecules through various addition and condensation reactions, highlighting its role as a key building block.

Conjugate Addition Reactions
2-Cyclohexen-1-one readily undergoes conjugate addition reactions, particularly with organocopper nucleophiles. This allows for the regioselective formation of new carbon-carbon bonds at the beta-position of the enone system.
Michael Reactions
It participates as a Michael acceptor in reactions with enol silanes and other nucleophiles. This pathway is crucial for synthesizing substituted cyclohexanone derivatives used in various chemical processes.
Phosphoniosilylation
The compound is employed in phosphoniosilylation reactions, a transformation that introduces both a phosphonium group and a silyl group onto the molecule, leading to complex organophosphorus compounds.
Organic Synthesis Building Block
As a versatile C6 cyclic ketone, it serves as a fundamental building block for the construction of complex organic molecules and heterocyclic compounds in academic and industrial research.
| Molecular weight | 96.13 |
|---|---|
| Linear formula | C6H8(=O) |
| Assay | ≥95% |
| Boiling point | 171-173 °C(lit.) |
| Density | 0.993 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.488(lit.) |
| Vapour pressure | 760 mmHg (168 °C) |
| Melting point | −53 °C(lit.) |
| Application | Versatile electrophile employed in a range of addition reactions including conjugate addition of organocopper nucleophiles,1 Michael reaction with enol silanes,2 and phosphoniosilylations.3 |


Hazard statements
- H226Flammable liquid and vapour
- H301Toxic if swallowed
- H310Fatal in contact with skin
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P302IF ON SKIN
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 56 °C / 132.8 °F |
| Transport (UN / ADR) | UN 2929 6.1/PG 2 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 22-23/24 |
| Safety statements (S) | 23-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 2-Cyclohexen-1-one used for?
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2-Cyclohexen-1-one is used as a versatile electrophile in organic synthesis, primarily for conjugate addition, Michael reactions, and phosphoniosilylation, serving as a key building block for complex molecules.
What are the CAS number and chemical formula for 2-Cyclohexen-1-one?
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The CAS number is 930-68-7 and the chemical formula is C6H8O.
What grade and purity does Tech Serve Solutions supply for 2-Cyclohexen-1-one?
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Tech Serve Solutions supplies 2-Cyclohexen-1-one with an assay of ≥95%. We do not represent this product as USP, BP, or EP grade.
How should 2-Cyclohexen-1-one be handled safely?
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2-Cyclohexen-1-one is a flammable liquid and vapour (H226) and is toxic if swallowed, inhaled, or in contact with skin (H301 + H331, H310). Handling requires appropriate personal protective equipment including eyeshields, face shield, gloves, and respiratory protection (type ABEK filter or full-face respirator). Ensure adequate ventilation and avoid ignition sources.
Can Tech Serve Solutions export 2-Cyclohexen-1-one?
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Yes, Tech Serve Solutions is a global supplier and exporter of fine chemicals, including 2-Cyclohexen-1-one, and can arrange for international shipments.
How can I request a quote or sample of 2-Cyclohexen-1-one?
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To request a quote or sample, please contact our sales department through the website or by phone, providing the product name and CAS number (930-68-7).
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