English Name: Cyclohexane (Synonym: Hexahydrobenzene)
Molecular Formula: C₆H₁₂
Molecular Weight: 84.16
CAS No.: 110-82-7
Physical and Chemical Properties
Appearance: Colorless, clear, and volatile liquid
Odor: Pungent gasoline-like odor
Melting Point: 6.5℃ (note: solidifies easily at low temperatures, requiring insulation during cold-area transportation)
Boiling Point: 80.7℃
Density: 0.778 g/cm³ (at 20℃)
Solubility: Insoluble in water; miscible with various organic solvents such as ethanol, ether, acetone, benzene, and petroleum ether.
Flash Point: -18℃ (closed cup; high flammability risk, requiring strict fire prevention measures)
Explosion Limit: 1.3%–8.4% (volume fraction in air)
Chemical Properties: Relatively stable under normal conditions and less reactive with other compounds. However, it can undergo oxidation, substitution, aromatization, and isomerization reactions under specific conditions (e.g., high temperature, presence of catalysts). For example, it oxidizes to cyclohexanol and cyclohexanone in the presence of a cobalt catalyst, which are key intermediates for nylon production.
Applications
Solvent:
Serves as a diluent for rubber, coatings, varnishes, and adhesives; used in ink manufacturing, industrial cleaning, and degreasing processes.
Acts as an extractant for fats and oils, suitable for separating lipid components from natural materials.
Chemical Raw Material:
A core raw material for producing nylon monomers, including adipic acid, hexamethylenediamine, and caprolactam.
Used in the synthesis of epoxy resins, pharmaceutical intermediates (e.g., intermediates for anti-inflammatory drugs), and vitamins (e.g., vitamin B12).
Other Uses:
Functions as a reference standard in chromatographic analysis (e.g., gas chromatography calibration).
Applied in the electronics industry for cleaning printed circuit boards (PCBs) to remove flux residues and oil stains.
Utilized in fragrance synthesis, fuel additives (to improve fuel stability), and processing aids for plastics and rubber (to enhance material flexibility).
Packaging and Storage
1. Packaging
Standard Packaging: Typically packed in 155 kg steel drums (cold-rolled steel with inner anti-corrosion coating to prevent rust and contamination). Other specifications (e.g., 150 kg/drum) are also available.
Customized Packaging: Special packaging (e.g., 1000 L IBC tanks for bulk orders, 20 L small plastic drums for laboratory use) can be provided upon customer request.
2. Storage
Store in a cool, well-ventilated warehouse; keep away from ignition sources and heat. The warehouse temperature should not exceed 25℃, and direct sunlight should be avoided.
Ensure containers are tightly sealed to prevent volatilization and moisture absorption.
Store separately from oxidants (e.g., hydrogen peroxide, nitric acid) to avoid potential reactions.
Warehouse lighting, ventilation, and other facilities must be explosion-proof. Equip the warehouse with appropriate types and quantities of fire-fighting equipment (e.g., dry powder fire extinguishers, foam fire extinguishers).
Prohibit the use of spark-generating machinery or tools in the storage area. Handle with care during loading and unloading to prevent package or container damage.
Safety Information
Toxicity: Long-term exposure is harmful to the central nervous system, potentially causing symptoms such as dizziness, headache, and fatigue. It may also irritate the skin and eyes; prolonged skin contact can lead to dryness and redness.
Hazardous Characteristics: Highly flammable. Its vapor forms an explosive mixture with air; contact with open flames, high heat, or sparks may trigger combustion or explosion. Vapors are heavier than air and can spread along the ground to distant ignition sources, leading to backfire.
Protective Measures:
Wear anti-static work clothes, chemical-resistant gloves (e.g., nitrile gloves), and safety goggles during operation. Use a vapor respirator if the concentration exceeds the safe limit.
Avoid using non-explosive electrical equipment in the workplace.
UN Dangerous Goods Shipping Number: UN 1145 (Class 3 Flammable Liquid, Packing Group II)