Cyclohexene

Cyclohexene is a hydrocarbon widely utilised across the chemical, pharmaceutical, and plastics industries. Known for its reactivity, flammability, and role as an intermediate in polymer and pharmaceutical production, Cyclohexene plays a key role in diverse manufacturing processes.

This guide provides a detailed overview of Cyclohexene’s chemical and physical characteristics, key benefits, applications, safety protocols, and environmental considerations.

Chemicals Characteristics

Synonyms: Cyclohexen, Tetrahydrobenzene, Benzene tetrahydride, Hexanaphthylene, 1-Cyclohexene
Chemical Formula: C₆H₁₀
CAS Number: 110-83-8

Molar Weight

82.14 g/mol

Melting Point

-103.5 °C

Boiling Point

83 °C

Flash Point

20 °F or -6.67 °C

Density

0.811 g/mL

Forms

Colourless liquid

Entire form

Key Points/Overview

Cyclohexene’s unsaturated structure imparts high reactivity, making it valuable as a chemical intermediate. It serves as a key starting material for the production of cyclohexanol and cyclohexanone, both essential in the synthesis of caprolactam—a precursor to nylon production.

Its flammability and volatility also make it effective as a solvent in certain organic synthesis applications. Cyclohexene’s balance of reactivity and stability supports its use in laboratory and industrial processes requiring efficient chemical transformations.

Uses & Benefits

Chemical Manufacturing

  • Intermediate Production: Used in the synthesis of cyclohexanol and cyclohexanone, essential for caprolactam and nylon manufacturing.

Pharmaceutical Industry

  • Synthetic Route: Serves as a starting material for pharmaceutical intermediates, aiding in the creation of complex organic molecules.

Solvent Applications

  • Organic Synthesis: Functions as a solvent in reactions involving non-polar reactants, facilitating efficient chemical processes.

Safety Information

Potential Hazards

  • Skin and Eye Irritation: May cause irritation; use appropriate PPE.

  • Inhalation: Vapour inhalation can cause respiratory irritation or narcotic effects at high concentrations.

  • Ingestion: Harmful if ingested; seek immediate medical assistance.

Safety Precautions

  • Personal Protective Equipment (PPE): Gloves, goggles, and respirators should be used.

  • Ventilation: Use in well-ventilated areas or employ local exhaust systems.

  • Emergency Response: In case of exposure, rinse affected areas with water and seek medical help if necessary.

Storage Recommendations

  • Containers: Store in tightly closed, flame-resistant containers.

  • Conditions: Keep in a cool, dry, well-ventilated area away from ignition sources and oxidising agents.

Occupational Exposure Controls

  • Engineering Controls: Use closed systems and explosion-proof ventilation to minimise vapour release.

  • Administrative Controls: Train personnel in safe handling and emergency response.

  • Health Surveillance: Monitor workers for symptoms of overexposure.

Environmental Impact and Disposal

  • Environmental Considerations: Volatile and flammable; avoid release into the environment.

  • Disposal Guidelines: Dispose of in accordance with local hazardous waste regulations. Prevent discharge into waterways.

Cyclohexene’s reactivity and versatility, coupled with stringent safety and environmental controls, make it an invaluable resource in chemical synthesis, pharmaceuticals, and materials manufacturing.