4-(Phenylazo)benzoyl chloride
4-(Phenylazo)benzoyl chloride (CAS: 104-24-5) is an organic compound with the linear formula C6H5N=NC6H4COCl and a molecular weight of 244.68 g/mol. This azo compound serves as a valuable building block in chemical synthesis. It is primarily utilised in the preparation of specific organic molecules, including polyacetylene derivatives. Tech Serve Solutions supplies this chemical with an assay of 97% for research and development purposes.

Synthesis of Polyacetylene Derivatives
4-(Phenylazo)benzoyl chloride is employed in the synthesis of polyacetylene derivatives. This application leverages the reactive benzoyl chloride group for further chemical modification.
Organic Synthesis Intermediate
As a functionalised azo compound, it acts as an intermediate in various organic synthesis pathways. Its structure allows for the introduction of the phenylazo moiety into target molecules.
Building Block for Complex Molecules
The compound functions as a useful building block in the construction of more complex organic structures. Its reactive sites enable diverse chemical transformations.
| Molecular weight | 244.68 |
|---|---|
| Linear formula | C6H5N=NC6H4COCl |
| Assay | 97% |
| Application | 4-(Phenylazo)benzoyl chloride was used in the synthesis of polyacetylene derivatives1. |
| Melting point | 94-97 °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) | 26-27-36/37/39-45 |
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-(Phenylazo)benzoyl chloride used for?
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4-(Phenylazo)benzoyl chloride is primarily used as a building block in organic synthesis, particularly in the preparation of polyacetylene derivatives.
What is the CAS number and formula for 4-(Phenylazo)benzoyl chloride?
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The CAS number is 104-24-5 and the linear formula is C6H5N=NC6H4COCl.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-(Phenylazo)benzoyl chloride with an assay of 97%. This product is suitable for research and general chemical synthesis and is not supplied as USP, BP, EP, or any pharmacopoeia grade.
What are the safety and handling precautions for 4-(Phenylazo)benzoyl chloride?
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This compound is classified as Danger, indicated by GHS05, and causes severe skin burns and eye damage (H314). Appropriate personal protective equipment, including eyeshields, face shields, chemical-resistant gloves, and respiratory protection (e.g., N100 or P3 filters), is mandatory during handling. Always refer to the Safety Data Sheet before use.
How is 4-(Phenylazo)benzoyl chloride shipped and exported?
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4-(Phenylazo)benzoyl chloride is shipped and exported according to international regulations for hazardous materials, identified under UN 3261, Class 8, Packing Group II.
How can I request a sample or quote for 4-(Phenylazo)benzoyl chloride?
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To request a sample or a quote, please contact the Tech Serve Solutions sales team via our website or direct inquiry channels.
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