4-Chlorobenzenesulfonic acid
4-Chlorobenzenesulfonic acid (CAS: 98-66-8), with the molecular formula ClC6H4SO3H and a molecular weight of 192.62 g/mol, is an organic compound featuring a sulfonic acid group and a chlorine atom on a benzene ring. It is recognised for its utility as a chemical intermediate and building block in organic synthesis. Its properties make it valuable in various chemical processes, particularly where its acidic and reactive functional groups can be leveraged for further transformations.
Chemical Synthesis Intermediate
4-Chlorobenzenesulfonic acid serves as a key intermediate in the synthesis of more complex organic molecules. Its sulfonic acid group can be readily functionalised or replaced, and the chlorobenzene moiety offers sites for nucleophilic aromatic substitution or cross-coupling reactions.
Organic Building Block
As an organic building block, this compound is used in the preparation of diverse chemical structures. It provides a foundational scaffold for introducing sulfonyl and chloro-phenyl functionalities into target molecules within research and industrial chemical development.
Dye and Pigment Precursor
Sulfonic acids, including derivatives of chlorobenzenesulfonic acid, have historically been used in the synthesis of dyes and pigments. The sulfonic acid group imparts water solubility, a crucial property for many dyestuff applications.
| Molecular weight | 192.62 |
|---|---|
| Linear formula | ClC6H4SO3H |
| Assay | 90% |
| Boiling point | 149 °C/22 mmHg(lit.) |
| Impurities tested | <3.5% H2SO4 |
Hazard statements
- H302Harmful if swallowed
- 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 2583PSN2 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-27-28-36/37/39-45 |
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-Chlorobenzenesulfonic acid used for?
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4-Chlorobenzenesulfonic acid is primarily used as an intermediate and building block in organic synthesis. It is also relevant in the synthesis of dyes and other complex organic compounds.
What are the CAS number and formula for 4-Chlorobenzenesulfonic acid?
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The CAS number is 98-66-8, and its linear formula is ClC6H4SO3H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Chlorobenzenesulfonic acid with an assay of 90%, containing less than 3.5% H2SO4 as an impurity. This product is not classified as USP, BP, or EP grade.
What are the main safety hazards associated with 4-Chlorobenzenesulfonic acid?
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4-Chlorobenzenesulfonic acid is classified as dangerous. It causes severe skin burns and eye damage (H314) and is harmful if swallowed (H302). Appropriate personal protective equipment, including eye protection, gloves, and respiratory protection, is essential when handling this chemical.
How is 4-Chlorobenzenesulfonic acid packed and shipped?
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This chemical is shipped under UN 2583, Hazard Class 8, Packing Group II. TSS ensures compliant packaging and export procedures for this material.
How can I request a quote or sample for 4-Chlorobenzenesulfonic acid?
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To request a quote or sample of 4-Chlorobenzenesulfonic acid, please contact the Tech Serve Solutions sales department via our website or direct inquiry.
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