Vinylcyclohexane 98% CAS NO. 695-12-5 High Purity Monomer: Key Properties, Industrial Applications & Safety Guidelines

For polymer manufacturers, chemical formulators and R&D teams across multiple industries, selecting high-performance monomers is the cornerstone of producing stable, high-quality end products. Among alicyclic olefin monomers, Vinylcyclohexane 98% (CAS 695-12-5) stands out thanks to its unique molecular structure, controllable reactivity and outstanding material modification capabilities.

If you are currently sourcing reliable monomers for polymerization, copolymerization or fine chemical synthesis, you may wonder whether 98% high-purity Vinylcyclohexane can match your production standards. Improper monomer selection will lead to unstable polymer performance, reduced product yield and extra production costs. This guide fully introduces the basic information, core properties, mainstream industrial applications, performance comparison with similar monomers, essential safety rules and supplier selection advice of Vinylcyclohexane 98%, helping you make a practical and cost-effective procurement decision.

What Is Vinylcyclohexane 98% (CAS 695-12-5)?

Vinylcyclohexane (abbreviated as VCH), with CAS number 695-12-5 and molecular formula C₈H₁₄, is a classic alicyclic α-olefin monomer. Our 98% high-purity grade is a clear, colorless to pale yellow liquid with a mild hydrocarbon odor at room temperature. Its molecular structure features a terminal vinyl double bond attached to a saturated cyclohexane ring, which combines moderate chemical reactivity and stable steric structure—this distinctive feature differentiates it from aromatic monomers and linear olefin monomers on the market.

Manufacturers favor 98% high-purity Vinylcyclohexane mainly because its low impurity content effectively avoids side reactions during polymerization and chemical synthesis. It acts not only as a primary monomer for self-polymerization but also as an excellent comonomer and chemical intermediate, widely applied in scenarios requiring high thermal stability, optical clarity and electrical insulation performance.

Key Properties of Vinylcyclohexane 98%

Understanding the core physical and chemical properties of Vinylcyclohexane is critical for matching production processes, optimizing formulations and ensuring consistent product quality. Below are the practical properties that industrial users need to focus on:

Controlled Polymerization Reactivity

The terminal vinyl group in its molecular structure gives Vinylcyclohexane stable and controllable polymerization activity. It can undergo self-polymerization to form poly(vinylcyclohexane) (PVCH), and also work well with ethylene, propylene and other olefins for copolymerization under metallocene catalysts. Unlike highly active monomers that easily cause excessive cross-linking, its moderate reactivity allows production teams to precisely regulate reaction progress, reducing defective products in batch production.

Excellent Physical & Solubility Characteristics

This high-purity monomer has a density of 0.805 g/mL at 25°C, a boiling point of 128°C and a refractive index of 1.446 (n20/D). It is insoluble in water but fully miscible with most conventional organic solvents, including methanol, hydrocarbons and ester solvents, which makes it easy to blend into various organic formulation systems. Its stable physical state at normal working temperatures ensures smooth material transfer and dosing in automated production lines.

Superior Derivative Material Performance

The saturated cyclohexane ring structure endows polymers and copolymers derived from Vinylcyclohexane with remarkable advantages: outstanding thermal resistance, low birefringence, excellent UV transparency and low dielectric constant. These properties are irreplaceable for high-end materials such as optical films and electronic insulating components, and also greatly enhance the weather resistance and mechanical strength of coatings and adhesives.

High Formulation Adaptability

98% high-purity Vinylcyclohexane has extremely low impurity interference. When used as a comonomer or additive, it will not cause phase separation, viscosity fluctuation or performance attenuation of the original formulation. It can be flexibly combined with other monomers, resins and additives to adjust the hardness, toughness and aging resistance of finished products, simplifying the overall formulation design for manufacturers.

Main Industrial Applications of Vinylcyclohexane 98%

Benefiting from its unique reactivity and structural advantages, Vinylcyclohexane 98% has been widely adopted in high-end manufacturing fields. The table below summarizes its core application scenarios across industries:

Specialty Polymer Production

As the core monomer for synthesizing PVCH, Vinylcyclohexane creates polymers with excellent heat resistance and electrical insulation, which are used to make wire and cable insulation, automotive lightweight parts and high-strength plastic shells. When used as a comonomer for polyethylene and polypropylene, it can significantly improve the rigidity, low-temperature toughness and oxidation resistance of polyolefin materials, expanding their service life in harsh environments.

Electronic & Optical Materials Industry

This is one of the fastest-growing application fields for high-purity Vinylcyclohexane. Its derived materials feature low moisture absorption, high optical transparency and stable dielectric properties, making it ideal for producing semiconductor encapsulants, electronic component protective layers and precision optical films. In optical storage and display industries, the low birefringence of PVCH effectively avoids light distortion, meeting the strict standards of high-precision optical equipment.

High-Performance Coatings, Adhesives & Sealants

In coating and adhesive formulations, Vinylcyclohexane acts as a functional comonomer to enhance the cross-linking density of resin systems. It greatly improves the UV resistance, scratch resistance and adhesion of coatings, so the finished coatings will not peel or fade after long-term outdoor use. For industrial sealants and structural adhesives, it optimizes the material's flexibility and aging resistance, suitable for automotive and construction sealing scenarios.

Pharmaceutical & Medical Technology

98% high-purity Vinylcyclohexane with strict impurity control is used as a key intermediate in the synthesis of antifungal, anti-inflammatory and neurological drugs. Meanwhile, its copolymer products have good biocompatibility and are widely used to produce disposable medical transparent parts such as syringes, blood collection tubes and laboratory analytical vessels, complying with medical production safety standards.

Fine Chemical Synthesis

Vinylcyclohexane is an important raw material for organic synthesis. Through ring-opening and oxidation reactions, it can be converted into cyclohexanediol, cyclohexanediol ether and vinylcyclohexane dioxide. These downstream products are used as polyester raw materials, solvent plasticizers and laboratory dehydrants, covering multiple fine chemical segments.

Vinylcyclohexane vs Similar Alicyclic Monomers: Performance Comparison

To help you select the most suitable monomer according to process requirements, we compare Vinylcyclohexane with two commonly used alicyclic and aromatic monomers from the aspects of structure, characteristics and application directions:

Styrene, as a traditional aromatic monomer, is low-cost but its benzene ring structure leads to poor anti-aging performance, so it cannot be used in outdoor high-end materials and optical fields. Cyclohexene has high volatility and unstable reaction process, only suitable for simple organic synthesis. In contrast, Vinylcyclohexane achieves a perfect balance between reactivity, stability and material modification performance. Although its unit price is higher than general monomers, it can greatly improve the comprehensive performance of end products and reduce the failure rate of finished products, which is more cost-effective for high-end industrial production.

Safety Precautions for Handling Vinylcyclohexane 98%

As a flammable organic liquid, Vinylcyclohexane 98% requires standardized operation during production, storage, transportation and use. Its flash point is about 15.6°C, so fire prevention, explosion protection and volatile gas protection are the top priorities for on-site management. The following are key safety guidelines for industrial use:

Ventilation Management

Volatile vapor will be generated when Vinylcyclohexane is exposed to air. Working areas such as polymerization workshops and formulation laboratories must be equipped with forced ventilation systems and exhaust fans to keep air circulating. In confined spaces, regular gas concentration detection is required to prevent vapor accumulation from causing dizziness, respiratory discomfort or fire hazards.

Personal Protective Equipment (PPE)

Workers in direct contact with the monomer must wear complete protective equipment: chemical-resistant gloves to avoid long-term skin contact; splash-proof safety goggles to prevent liquid from hurting eyes during transferring and dosing; in areas with high vapor concentration, wear professional organic vapor respirators in accordance with workplace safety regulations.

Standardized Storage

Store Vinylcyclohexane in a cool, dry and well-ventilated dedicated chemical warehouse. Keep the storage temperature below 30°C, away from direct sunlight, high-temperature equipment and all ignition sources such as open flames and static electricity generators. The containers must be tightly sealed to prevent volatile loss and moisture contamination. It should be stored separately from strong oxidants to avoid chemical reactions.

Transportation Rules

During transportation, use sealed dedicated chemical drums or professional tank containers to prevent leakage. Follow UN 3295 hazardous goods transportation standards, fix the containers firmly to avoid collision and overturning during transit. Transport vehicles must be equipped with fire extinguishers, and drivers and porters need to receive professional hazardous chemical operation training.

Emergency Handling

In case of liquid leakage, first cut off all nearby ignition sources, absorb the leaked liquid with inert absorbent cotton or sand, and do not flush directly with water. Once skin or eye contact occurs, rinse the contacted part with plenty of clean water for more than 15 minutes immediately and seek medical treatment in time.

How to Choose a Reliable Vinylcyclohexane 98% Monomer Supplier

Stable product purity, continuous supply and professional technical support are the three major factors for long-term procurement of high-purity monomers. Sourcing unqualified products will lead to uncontrollable polymerization reactions and large batches of defective products, bringing huge losses to production. When selecting a supplier for Vinylcyclohexane 98%, please refer to the following standards:

First, verify product purity and testing reports. Formal suppliers must provide GC (Gas Chromatography) test reports and full-component analysis data for each batch of products to ensure the actual purity reaches 98% and impurity content meets industrial and medical grades requirements.

Second, check the supplier's qualification system. Prioritize manufacturers with ISO9001 quality management certification, ISO14001 environmental management certification and complete hazardous chemical production and operation qualifications, which can guarantee standardized production and stable batch quality.

Third, evaluate supply capacity and logistics. Choose suppliers with large-scale production bases and complete storage facilities to avoid out-of-stock and delayed delivery. Meanwhile, confirm that the supplier has professional hazardous chemical packaging and long-distance transportation capabilities to ensure product safety during delivery.

Fourth, focus on technical after-sales service. Excellent suppliers can provide targeted formulation suggestions and reaction parameter guidance according to your polymerization, coating or pharmaceutical synthesis processes, helping you optimize production efficiency.

Our partner chemical supplier has decades of experience in producing high-purity alicyclic monomers, specializing in Vinylcyclohexane 98% and other premium chemical raw materials for global industrial clients. We strictly control every production link from raw material feeding to finished product refining, with stable batch quality, diverse packaging specifications and flexible global delivery solutions. Our professional technical team can also provide one-to-one process matching support for different application scenarios.

Conclusion

As a high-value alicyclic monomer, Vinylcyclohexane 98% (CAS 695-12-5) relies on its controllable reactivity, excellent solvent compatibility and outstanding material modification performance, becoming an irreplaceable raw material in specialty polymers, electronics, optical materials, medical treatment and high-end coatings industries.

For polymer formulators and chemical procurement personnel, besides focusing on product price, it is more important to match monomer properties with production processes, strictly implement on-site safety operation specifications and select qualified and stable suppliers. Whether you are developing new high-performance materials or upgrading existing formulations, 98% high-purity Vinylcyclohexane can effectively improve the core

competitiveness of your products.

FAQs About Vinylcyclohexane 98% (CAS 695-12-5)

What is Vinylcyclohexane 98% mainly used for?

Vinylcyclohexane 98% is primarily used as a high-purity monomer and chemical intermediate. It is widely used to synthesize PVCH and modified polyolefin materials, produce electronic encapsulants and optical films, prepare high-performance coatings, adhesives and medical transparent parts, and also serves as a key raw material for fine chemical and pharmaceutical intermediate synthesis.

Is Vinylcyclohexane soluble in water?

No. Vinylcyclohexane is insoluble in water, but it can be well dissolved in most organic solvents such as hydrocarbons, alcohols and esters, so it is suitable for various organic-phase polymerization and coating formulation systems.

What are the advantages of Vinylcyclohexane compared with styrene?

Different from styrene with aromatic structure, Vinylcyclohexane has a saturated cyclohexane ring. Its derived materials have better UV resistance, thermal stability and low birefringence, and will not turn yellow or age easily after long-term use. It is more suitable for high-end fields such as optics, electronics and outdoor high-performance materials.

What safety issues need to be noted when using Vinylcyclohexane?

Vinylcyclohexane is a flammable liquid with low flash point. Keep away from open flames and static electricity during use and storage. Ensure good ventilation in the working area, wear corresponding personal protective equipment, and follow hazardous chemical storage and transportation specifications to prevent leakage and fire risks.

Can Vinylcyclohexane be used for copolymerization with polyolefins?

Yes. As an excellent comonomer, Vinylcyclohexane can undergo copolymerization reactions with ethylene and propylene under metallocene catalysts, which can significantly enhance the mechanical strength, low-temperature toughness and anti-aging performance of polyolefin products.