4-Chlorocatechol
4-Chlorocatechol (CAS: 2138-22-9), with the molecular formula ClC6H3(OH)2 and a molecular weight of 144.56 g/mol, is a chlorinated derivative of catechol. It presents as a solid and is primarily utilised as a building block in organic synthesis. This compound plays a role in the creation of more complex chemical structures, contributing to research and development in various chemical sectors.

Organic Synthesis Intermediate
4-Chlorocatechol serves as a valuable intermediate in the synthesis of diverse organic molecules. Its functional groups allow for various chemical transformations, making it a useful component in multi-step synthetic pathways.
Research and Development
This compound is employed in laboratory settings for research purposes, contributing to the exploration of new chemical reactions and the development of novel compounds with potential applications in materials science and pharmaceuticals.
Building Block for Specialty Chemicals
As a functionalised aromatic compound, 4-Chlorocatechol acts as a foundational building block for the production of various specialty chemicals and fine chemical intermediates.
| Molecular weight | 144.56 |
|---|---|
| Linear formula | ClC6H3(OH)2 |
| Assay | 97% |
| Melting point | 90-94 °C(lit.) |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3261 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Chlorocatechol used for?
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4-Chlorocatechol is primarily used as a building block in organic synthesis and for research and development purposes in chemical laboratories.
What is the CAS number and molecular formula for 4-Chlorocatechol?
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The CAS number for 4-Chlorocatechol is 2138-22-9, and its molecular formula is ClC6H3(OH)2.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Chlorocatechol with an assay of 97%. We do not represent this product as USP, BP, or EP grade.
How should 4-Chlorocatechol be handled safely?
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4-Chlorocatechol causes severe skin burns and eye damage (H314). Handle with appropriate personal protective equipment, including eyeshields, face shields, gloves, and respiratory protection. Ensure good ventilation.
Is 4-Chlorocatechol suitable for export or international shipment?
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Yes, 4-Chlorocatechol is classified as UN 3261, Class 8, Packing Group II, making it suitable for export and international shipment under relevant dangerous goods regulations.
How can I request a sample or quote for 4-Chlorocatechol?
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To request a sample or quote for 4-Chlorocatechol, please contact the Tech Serve Solutions sales department via our website or direct inquiry channels.
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