1、 Product Overview
Vinylbenzel Chloride (VBC), CAS number 30030-25-2, is a key functional monomer that combines both vinyl and chloromethyl functional groups. This unique “dual reactive” molecular structure makes it an ideal “molecular bridge” connecting polymerization reactions and organic synthesis.
This product usually exists in the form of a mixture of meta – and para isomers, with stabilizers added to prevent self polymerization. The purity of commercially available products is generally ≥ 95% to ≥ 97%.
2、 Basic Product Information
Chinese name: Chloromethyl vinyl benzene
English name: Vinylbenzel Chloride (VBC)
CAS number: 30030-25-2
Molecular formula: C ₉ H ₉ Cl
Molecular weight: 152.62
Structural formula：
EINECS number: 250-005-9
Appearance and Characteristics: Colorless to light yellow transparent liquid with a pungent odor
Density: Approximately 1.07-1.08 g/cm ³ (at 25 ° C)
Boiling point: approximately 226-229 ° C (atmospheric pressure)
Melting point: about -30 ° C
Flash point: Approximately 88-107 ° C (closed cup)
Steam density: 5.3 (air=1), steam is heavier than air
Vapor pressure: 1 mmHg (at 56.1 ° C)
Solubility: soluble in organic solvents such as toluene, xylene, ether, chloroform, etc., insoluble in water
Stability: For light, moisture, and thermal sensitivity, stabilizers need to be added and stored at low temperatures
Isomers: Commercially available typically consist of a mixture of meta – and para isomers
Product Manager Email:ada@coreychem.com
3、 Frequently Asked Questions (FAQ)
1）What are its main physical properties?
Appearance: Colorless to light yellow liquid
Boiling point: approximately 229 ° C
Flash point: Approximately 104-107 ° C, classified as a flammable liquid
Density: Approximately 1.07 g/cm ³, heavier than water
Solubility: soluble in various organic solvents, insoluble in water
2）What protective measures are required to use it?
The operation must be carried out in a fume hood:
Respiratory protection: To prevent inhalation of vapors, appropriate respiratory protective equipment should be worn
Eye and face protection: Close fitting safety goggles must be worn
Body protection: Wear protective clothing and gloves to avoid skin contact
Hygiene measures: Thoroughly wash the skin after homework, and do not take work clothes out of the workplace
3）How to deal with a leak?
Evacuation and Ventilation: Evacuate unrelated personnel and ensure adequate ventilation in the area
Personal protection: Cleaners must wear complete protective equipment
Encirclement and Collection: Use inert materials to enclose and prevent entry into sewers or bodies of water, and collect in suitable containers
Disposal: According to regulations, it shall be handed over to qualified waste disposal institutions for disposal
4）Is it flammable? What is used to extinguish a fire?
This substance is flammable. Steam may form explosive mixtures with air under strong heating, and toxic hydrogen chloride gas may be produced during combustion. Suitable extinguishing agents include: water mist/water spray, foam, carbon dioxide, dry powder. Firefighters should wear self-contained breathing apparatus and full body protective clothing.
5）How to store correctly?
Temperature: Recommended for frozen storage at -20 ° C or refrigerated at 2-8 ° C
Inert atmosphere: must be stored under inert gas (such as nitrogen) protection
Avoid light and moisture: Sensitive to light, moisture, and heat, containers must be strictly sealed
Stabilizers: Products usually add stabilizers (such as TBC, ONP, etc.) to prevent polymerization and cannot be destroyed
4、 Application Cases
1）High performance anion exchange membrane (AEM) materials
Chloromethyl vinyl benzene is the core functional monomer for preparing anion exchange membranes. The chloromethyl group on its polymerized skeleton can efficiently introduce quaternary ammonium cationic groups through quaternization reaction with tertiary amines such as trimethylamine, endowing the membrane material with ion conductivity.
Research has shown that anion exchange membranes (AVSH membranes) prepared based on VBC have an ion exchange capacity (IEC) of 1.18 meq/g, significantly higher than traditional styrene based post chloromethylation membranes (0.8-1.0 meq/g), with an increase of 18% -48%. This material has important application value in energy fields such as fuel cells and flow batteries.
2）Water absorption and conductivity performance of anion exchange membrane
The anion exchange membrane prepared using VBC copolymer exhibits excellent hydrophilicity and ion conductivity properties. The maximum water absorption rate of AVSH membrane can reach 40.2%, which is higher than the conventional water absorption level of commercially available anion exchange membranes (about 25-35%).
Moderate water absorption is crucial for balancing the ion conductivity and mechanical stability of the membrane, which gives VBC based membrane materials a quantifiable performance advantage in specific hydration environments.
3）RAFT controllable polymerization kinetics
Chloromethyl vinyl benzene is an ideal monomer for controlled radical polymerization, such as RAFT polymerization. Research has shown that the RAFT homopolymerization kinetics parameter kp ²/kt of VBC at 80 ° C is approximately 3 × 10 ⁻³ L mol ⁻¹ s ⁻¹, significantly higher than the approximately 1 × 10 ⁻³ L mol ⁻¹ s ⁻¹ of styrene under the same conditions.
This means that VBC has a faster polymerization rate, which helps to prepare block copolymers with narrow molecular weight distribution and clear structure.
4）Ion exchange resin and adsorbent materials
Macroporous or gel type polymer microspheres can be prepared by copolymerization of chloromethyl vinyl benzene and divinylbenzene (DVB).
The chloromethyl group on the skeleton is the key active site:
Anion exchange resin can be prepared by reacting with trimethylamine (quaternization) for water treatment, ultrapure water preparation, drug purification, and wet metallurgy;
Chelating resins can be prepared by introducing functional groups containing nitrogen and oxygen coordination atoms for highly selective separation and recovery of metal ions;
Under Friedel Crafts conditions, ultra-high crosslinking bridges can also be formed to prepare high specific surface area adsorption resins.
5）Drug delivery system carrier
Based on the controllable functionalization properties of Poly (VBC), it is an ideal platform for constructing advanced drug delivery systems (DDS).
The chloromethyl group on the polymer backbone can be chemically linked to targeted ligands (such as antibodies, peptides), therapeutic drugs, or hydrophilic polyethylene glycol (PEG) segments. Through controllable radical polymerization techniques (RAFT, ATRP), the molecular weight and structure of polymers can be precisely controlled, thereby accurately regulating drug release kinetics.
5、 Safety and Storage
1）Safety
Chloromethyl vinyl benzene is classified as a hazardous substance with the signal word ‘hazardous’ (UN2922/8/6.1/II).
2）Storage
To ensure product stability, the following storage conditions must be strictly followed:
Temperature control: Recommended for frozen storage at -20 ° C, or at least refrigerated at 2-8 ° C
Inert atmosphere protection: It must be sealed and stored under inert gas (such as nitrogen) protection to prevent oxidation and polymerization
Avoid light and moisture: Sensitive to light, moisture, and heat, containers must be strictly sealed away from light
Stabilizer system: Products usually contain stabilizers (such as TBC, ONP, ortho nitrocresol, etc.), and care should be taken not to damage the stabilizer system during use and sampling
6、Product Manager Information
Product Manager: Ada Wang
Email: ada@coreychem.com
