As an important organic intermediate and solvent widely used in the chemical industry, cyclohexanone is mainly applied in industries such as resin, coating and chemical fiber. Due to its characteristics of flammability, volatility and irritation, various questions often arise during its production, storage, transportation and application. This paper sorts out high-frequency industry questions and provides professional answers based on physical and chemical properties as well as safety specifications, offering practical references for relevant practitioners.
1. Basic Physical and Chemical Properties of Cyclohexanone
Cyclohexanone (CAS: 108-94-1) has a molecular formula of C₆H₁₀O. Under normal temperature and pressure, it is a colorless to pale yellow transparent liquid with a special sweet odor similar to mint and camphor, which is irritating at high concentrations. It has stable core physical and chemical parameters: a melting point of -45°C, a boiling point of 155.6°C, and a density of 0.9478 g/cm³ at 20°C. Being lighter than water, it will float on the water surface in case of leakage. Slightly soluble in water, cyclohexanone is miscible with most organic solvents such as ethanol, ether and benzene. With a closed-cup flash point of 46°C, it is classified as a Class B flammable liquid. Its vapor can form explosive mixtures with air, with a volume explosion limit of 1.1%–9.4%. It is prone to combustion and explosion when exposed to open flames, high temperatures and strong oxidants.
2. Core Applications of Cyclohexanone
Cyclohexanone is a core raw material in fine chemical engineering with extensive application scenarios. Its primary use is the preparation of caprolactam and adipic acid, which are further processed to produce nylon 6, nylon 66 and other chemical fiber products, making it a key intermediate in the textile and chemical fiber industry. Meanwhile, it serves as a high-performance industrial solvent with strong solubility for polymer materials including polyurethane, epoxy resin and acrylic resin, and is widely used in the production of coatings, inks, adhesives and leather finishing agents. In addition, it can be applied in the preparation of rubber antioxidants, organic synthesis auxiliaries and pharmaceutical intermediates, and is commonly used in plastic processing and metal cleaning.
3. Hazards of Cyclohexanone to Human Health
Cyclohexanone is toxic and irritating, and can invade the human body through respiratory inhalation, skin contact and oral ingestion. Long-term exposure to low-concentration cyclohexanone will irritate the mucous membranes of the eyes, nose and throat, causing symptoms such as tearing, coughing and dry throat. Prolonged skin contact will damage the skin oil layer, leading to dryness, peeling, chapping and contact dermatitis. Inhalation of high-concentration vapor inhibits the central nervous system, resulting in anesthetic symptoms such as dizziness, nausea, fatigue and vomiting, and severe cases may involve confusion, hypothermia and tremors. Accidental ingestion will irritate the gastrointestinal tract and damage liver and kidney functions. In occupational scenarios, the workplace maximum allowable concentration is strictly controlled at 200 mg/m³.
4. Standard Specifications for Cyclohexanone Storage and Transportation
For storage, cyclohexanone shall be kept in a special chemical warehouse that is cool, dry and well-ventilated, away from fire sources and heat sources. The warehouse temperature should not exceed 30°C, and direct sunlight is prohibited. Containers must be tightly sealed to prevent volatilization and leakage. Mix storage with oxidants, strong acids and strong bases is forbidden. The warehouse shall be equipped with explosion-proof lighting, ventilation facilities and fire extinguishers. For transportation, cyclohexanone shall be delivered in accordance with the standards for flammable liquid hazardous chemicals. Transport vehicles must hold qualified hazardous chemical transportation certificates and be equipped with anti-static devices, fire-fighting equipment and emergency protective supplies. During transportation, exposure to sunlight, severe bumping and impact shall be avoided. Mix transportation with food and oxidants is prohibited. Loading and unloading operations shall be handled gently to prevent leakage.
5. Emergency Treatment for Cyclohexanone Leakage and Human Exposure
In case of skin contact, remove contaminated clothing immediately and rinse the affected skin thoroughly with plenty of running clean water for at least 15 minutes. For eye contact, hold the eyelids open and continuously flush the eyes with clean water or normal saline before seeking medical treatment in a timely manner. In case of inhalation, quickly move from the contaminated area to fresh air. Provide oxygen assistance for breathing difficulties, and perform artificial respiration immediately for respiratory arrest before medical treatment. Once leakage occurs, evacuate irrelevant personnel quickly, isolate the leakage area and cut off all fire sources to prevent open flames and static electricity. Small-area leakage can be adsorbed with sand or activated carbon. For large-scale leakage, build dikes for containment, collect the leaked liquid for recovery or hand it over to professional institutions for disposal. Direct discharge into water bodies and sewers is strictly prohibited.
6. Precautions for Daily Cyclohexanone Operation
Operators must receive professional training and strictly abide by operating specifications. Personal protective equipment including goggles, solvent-resistant rubber gloves and gas masks must be worn throughout the operation. The operation site shall maintain full ventilation, and smoking, eating and drinking are forbidden to eliminate potential fire risks. All production equipment shall operate in a closed state, and pipelines and valves shall be inspected regularly to prevent leakage. After operation, operators shall wash hands and face thoroughly and change work clothes, and shall not wear contaminated work clothes in living areas. In addition, warning signs shall be set up in the operation area, equipped with emergency flushing facilities and fire extinguishing equipment, and regular emergency drills shall be carried out.
Post time: Jun-25-2026