Monochlorophenols: Complete Guide to 2-, 3- and 4-Chlorophenol Isomers
Monochlorophenols: Complete Guide to 2-, 3- and 4-Chlorophenol Isomers
Monochlorophenols are chlorinated aromatic compounds derived from phenol by replacing one hydrogen atom on the benzene ring with chlorine. The three commercially important positional isomers include 2-Chlorophenol (o-Chlorophenol, CAS 95-57-8), 3-Chlorophenol (m-Chlorophenol, CAS 108-43-0), and 4-Chlorophenol (p-Chlorophenol, CAS 106-48-9).
Although these three compounds share the same molecular formula C6H5ClO and molecular weight of 128.56 g/mol, the position of chlorine significantly affects their physical properties, molecular symmetry, hydrogen bonding behavior, melting point, and suitability for downstream synthesis.
Aure Chemical is an international specialty chemical supplier and sourcing partner providing chlorophenol isomers with supporting documentation including COA, SDS, technical information, and export logistics support for global customers.
What Are Monochlorophenols?
Monochlorophenols refer to phenol derivatives containing one chlorine substituent on the aromatic ring. The prefix "mono" distinguishes these compounds from higher chlorinated phenols such as dichlorophenols and pentachlorophenols.
The three main positional isomers are:
Comparison of 2-, 3- and 4-Chlorophenol Isomers
| Product | CAS No. | Position | Molecular Formula | Physical Form | Industrial Consideration |
|---|---|---|---|---|---|
| 2-Chlorophenol | 95-57-8 | Ortho (2-) | C6H5ClO | Liquid at room temperature | Lower melting point and different steric environment caused by adjacent chlorine and hydroxyl groups |
| 3-Chlorophenol | 108-43-0 | Meta (3-) | C6H5ClO | Low melting solid | Intermediate physical characteristics with unique electronic effects |
| 4-Chlorophenol | 106-48-9 | Para (4-) | C6H5ClO | Solid | Higher molecular symmetry and stable solid-state behavior |
Individual Chlorophenol Products
Customers can review detailed product information through Aure Chemical's dedicated product pages:
2-Chlorophenol (CAS 95-57-8) Product Page - technical information, specifications, and supply details.
3-Chlorophenol (CAS 108-43-0) Product Page - product information for industrial and research applications.
4-Chlorophenol (CAS 106-48-9) Product Page - para-chlorophenol supply information and documentation support.
Why Chlorine Position Changes Chlorophenol Properties
The difference between ortho, meta, and para substitution affects molecular symmetry, steric interaction, and chemical behavior.
2-Chlorophenol has chlorine positioned close to the hydroxyl group, creating different steric effects and possible intramolecular interactions.
4-Chlorophenol has greater molecular symmetry, which contributes to higher melting characteristics.
3-Chlorophenol shows intermediate behavior between the ortho and para isomers.
Industrial Applications of Chlorophenol Isomers
Monochlorophenols are mainly used as aromatic intermediates in specialty chemical manufacturing. Their applications depend on the required molecular structure and reaction pathway.
Pharmaceutical and Fine Chemical Intermediates
Chlorophenol derivatives are used as starting materials or intermediates for preparing more complex aromatic compounds. High purity, controlled impurities, and reliable documentation are important for pharmaceutical-related applications.
Learn more:Chlorophenols for Pharmaceutical and Fine Chemical Intermediates
Agrochemical Intermediate Applications
Certain chlorophenol isomers are used in agrochemical synthesis routes where correct positional isomer selection is essential for process efficiency and final product quality.
Learn more:Chlorophenols in Agrochemical Synthesis
Dye and Pigment Intermediate Applications
Chlorinated phenols can serve as intermediates in dye and pigment chemistry where substitution position influences downstream reactions.
Learn more:Chlorophenols for Dye and Pigment Manufacturing
Organic Synthesis and Specialty Chemicals
Because of their phenolic hydroxyl group and aromatic chlorine atom, monochlorophenols are valuable building blocks in organic synthesis and specialty chemical development.
Learn more:Chlorophenols in Organic Synthesis and Specialty Chemical Manufacturing
How to Choose the Right Chlorophenol Isomer
Target downstream molecular structure
Required reaction pathway
Purity and impurity requirements
Preferred physical form
Storage and transportation conditions
Documentation requirements including COA and SDS
| Requirement | Recommended Consideration |
|---|---|
| Liquid handling preferred | 2-Chlorophenol |
| Solid material preferred | 4-Chlorophenol |
| Specific meta substitution chemistry | 3-Chlorophenol |
Quality Considerations for Chlorophenol Buyers
Industrial buyers normally evaluate chlorophenols based on:
Assay / purity
Residual phenol content
Other isomer content
Moisture
Appearance and color
Batch consistency
Aure Chemical provides quality documentation support including COA and SDS to help customers evaluate product suitability for their applications.
Why Choose Aure Chemical
Global chemical sourcing capability
Professional export documentation support
COA and SDS availability
Support for laboratory evaluation and commercial supply
International logistics coordination
Frequently Asked Questions
What are monochlorophenols?
Monochlorophenols are phenol compounds containing one chlorine atom on the aromatic ring, including 2-, 3-, and 4-Chlorophenol.
Are chlorophenol isomers interchangeable?
No. Different chlorine positions create different physical properties and reaction behavior.
Can Aure Chemical provide COA and SDS?
Yes. COA and SDS documentation can be provided according to customer requirements.
How can I request a quotation?
Please provide CAS number, quantity, purity requirement, packaging preference, and destination. Aure Chemical can support quotation and supply evaluation.
Need the right chlorophenol isomer for your application?
Contact Aure Chemical for monochlorophenol sourcing support, technical documentation, and international supply solutions.