Quick Answer
Cyclohexanone is not easily oxidized under normal storage conditions. It is relatively stable when stored in sealed containers away from heat, light, and strong oxidizing agents.
However, cyclohexanone can undergo oxidation reactions under controlled industrial conditions - especially in the presence of oxidants or catalysts - producing important intermediates such as adipic acid, a key raw material for nylon manufacturing.
In short: cyclohexanone is chemically stable enough for standard warehousing and transport, but it is also a valuable oxidation substrate when the reaction is deliberately controlled at industrial scale.
What Is Cyclohexanone?
Cyclohexanone is a cyclic ketone widely used as a solvent and as a chemical intermediate in nylon and resin production.
| Property | Value |
|---|---|
| Chemical Name | Cyclohexanone |
| CAS Number | 108-94-1 |
| Formula | C6H10O |
| Molecular Weight | 98.15 g/mol |
| Appearance | Colorless to pale yellow liquid |
| Boiling Point | 155.6°C |
| Flash Point | ~43°C (closed cup) |
Is Cyclohexanone Easily Oxidized?
No - cyclohexanone is moderately stable under normal conditions. Two factors explain why it doesn't oxidize readily on its own, and why oxidation still matters industrially.
1. Carbonyl structure. Cyclohexanone's molecule already contains a carbonyl group (C=O) at the ring position. This carbonyl is the product of oxidizing the corresponding alcohol (cyclohexanol), and once it's formed, the molecule is comparatively resistant to further spontaneous oxidation compared with more reactive functional groups. The ring carbon adjacent to the carbonyl is where controlled oxidation chemistry eventually happens - but this requires deliberate reaction conditions, not just ambient air exposure.
2. Normal storage conditions. At room temperature, in sealed drums, and in a dry environment away from strong oxidizers, cyclohexanone does not undergo meaningful spontaneous oxidation. This is why it can be stored and shipped as a standard industrial liquid rather than requiring specialized inert-atmosphere packaging.
| Condition | Oxidation Risk |
|---|---|
| Normal warehouse storage | Low |
| Heat exposure | Moderate |
| Strong oxidizer present | High |
| Catalytic oxidation conditions | High |
Cyclohexanone Oxidation Reaction
While cyclohexanone is stable in storage, its oxidation chemistry is one of the most industrially important reactions in the ketone's profile.
Industrial oxidation pathway:
Cyclohexanone oxidation is a core industrial reaction for adipic acid production, typically carried out using nitric acid oxidation or catalytic air oxidation under controlled temperature and pressure. Adipic acid is, in turn, one of the two key monomers (alongside hexamethylenediamine) used to manufacture nylon 6,6, making cyclohexanone oxidation a foundational step in the synthetic fiber and engineering plastics supply chain.
This is also why cyclohexanone is frequently produced and used alongside cyclohexanol as a mixed intermediate ("KA oil," short for ketone-alcohol oil) feeding directly into adipic acid plants.
Factors Affecting Cyclohexanone Oxidation Stability
Several external factors influence how readily cyclohexanone oxidizes, which is directly relevant to how it should be handled and stored:
| Factor | Effect |
|---|---|
| Temperature | Higher temperature accelerates oxidation reactions |
| Oxygen exposure | Prolonged air exposure increases oxidation possibility |
| Light | May contribute to long-term degradation in stored material |
| Metal contaminants | Trace metals can catalyze unwanted oxidation |
| Oxidizing agents | Contact with strong oxidizers can trigger rapid reaction |
For buyers, this table doubles as a checklist: minimizing heat, headspace oxygen, light exposure, and contamination during storage and transport directly protects product quality until use.
Cyclohexanone Stability During Storage - How Should Cyclohexanone Be Stored?
Proper storage keeps cyclohexanone well within its stable range and prevents unwanted oxidation or quality drift before use:
- Store in a cool and well-ventilated warehouse, away from direct sunlight and heat sources.
- Keep containers tightly closed to minimize headspace oxygen exposure and moisture ingress.
- Avoid contact with oxidizing agents, including strong acids, peroxides, and other reactive oxidizers.
- Protect from excessive heat during both storage and transport, particularly in high-temperature climates or shipping routes.
| Packaging | Application |
|---|---|
| 25kg drum | Small-quantity / lab and pilot use |
| 190kg drum | Standard industrial shipment |
| ISO Tank | Bulk export and large-volume industrial supply |
Does Cyclohexanone Have a Shelf Life?
When properly stored - sealed, cool, and away from oxidizing conditions - industrial-grade cyclohexanone maintains stable quality for long-term storage. Exact shelf-life specifications vary by manufacturer and packaging format, so buyers should always confirm the specific shelf-life and recommended storage conditions listed on the supplier's Technical Data Sheet (TDS) rather than assuming a universal figure.
Supplier Quality Considerations - What Should Buyers Check Before Purchasing Cyclohexanone?
For buyers sourcing bulk cyclohexanone, oxidation stability and overall product quality are closely tied to how well a batch was manufactured, purified, and packaged. Before purchasing from an industrial grade cyclohexanone supplier or cyclohexanone manufacturer, it's worth requesting the following documentation:
| Document | Purpose |
|---|---|
| COA (Certificate of Analysis) | Verifies purity and confirms the batch meets specification |
| SDS (Safety Data Sheet) | Provides safety, handling, and storage information |
| TDS (Technical Data Sheet) | Details technical properties, including shelf-life guidance |
| GC Analysis | Confirms impurity levels that could affect stability or downstream reactions |
A supplier able to provide complete, batch-specific documentation is generally a stronger indicator of consistent manufacturing quality than price alone - particularly for buyers feeding cyclohexanone into sensitive downstream processes like adipic acid or caprolactam production.
FAQ
Does cyclohexanone oxidize in air?
Cyclohexanone does not rapidly oxidize under normal atmospheric storage conditions. Oxidation generally requires stronger reaction conditions, such as elevated temperature, catalysts, or a strong oxidizing agent.
What does cyclohexanone oxidation produce?
Controlled oxidation of cyclohexanone can produce adipic acid, an important intermediate for nylon 6,6 production.
How should cyclohexanone be stored?
Store cyclohexanone in tightly sealed containers, in a cool and ventilated area, away from heat, light, and incompatible oxidizing materials.
Is cyclohexanone chemically stable long-term?
Yes, under proper storage conditions cyclohexanone remains chemically stable for extended periods. Buyers should confirm specific shelf-life guidance from the supplier's TDS.
What materials are compatible with cyclohexanone storage?
Stainless steel is generally the preferred storage material, with carbon steel also generally acceptable. Contact with strong oxidizing agents should be avoided.
Is cyclohexanone used to make adipic acid?
Yes. Cyclohexanone (often as part of a cyclohexanone/cyclohexanol mixture known as KA oil) is oxidized industrially, typically with nitric acid or catalytic processes, to produce adipic acid - a core raw material in nylon 6,6 manufacturing.
Cyclohexanone Supplier (CAS 108-94-1)
Tianjin Gnee Biotech Co., Ltd. supplies industrial-grade cyclohexanone (CAS 108-94-1) for nylon production, coatings, and solvent applications, with full SDS, COA, and TDS documentation available. Contact us for specifications, pricing, and bulk order support.
