4-Chloro-3-nitrobenzenesulfonic acid sodium salt
4-Chloro-3-nitrobenzenesulfonic acid sodium salt (CAS: 17691-19-9; Formula: ClC6H3(NO2)SO3Na; MW: 261.62) is an organic compound characterised by its sulfonic acid sodium salt and nitro functionalities. It serves as a valuable intermediate and building block in organic synthesis, particularly in the preparation of dyestuffs and other complex organic molecules. Its specific reactivity makes it a useful component in various chemical research and development applications.

Intermediate in Organic Synthesis
This compound functions as a key building block for the synthesis of more complex organic molecules. Its functional groups allow for various chemical transformations, making it versatile in multi-step synthetic routes.
Dye Precursor
It is often employed in the production of dyes and pigments. The presence of the nitro and sulfonic acid groups can be leveraged to create chromophores and enhance water solubility in the final dye products.
Chemical Research and Development
Used in academic and industrial research laboratories for exploring new synthetic pathways and developing novel compounds with specific properties.
| Molecular weight | 261.62 |
|---|---|
| Linear formula | ClC6H3(NO2)SO3Na |
| Assay | 80% |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-37/39 |
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-Chloro-3-nitrobenzenesulfonic acid sodium salt used for?
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4-Chloro-3-nitrobenzenesulfonic acid sodium salt is primarily used as an intermediate and building block in organic synthesis, particularly in the preparation of dyes and complex organic molecules for research and development.
What is the CAS number and chemical formula for this compound?
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The CAS number is 17691-19-9 and the chemical formula is ClC6H3(NO2)SO3Na.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this product with an assay of 80%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should 4-Chloro-3-nitrobenzenesulfonic acid sodium salt be handled?
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This compound is classified as a Warning with hazards H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Handle with appropriate personal protective equipment including a dust mask (type N95 US), eyeshields, and gloves. Ensure adequate ventilation.
Is 4-Chloro-3-nitrobenzenesulfonic acid sodium salt exported by TSS?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including 4-Chloro-3-nitrobenzenesulfonic acid sodium salt.
How can I request a sample or quote?
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To request a sample or a quote for 4-Chloro-3-nitrobenzenesulfonic acid sodium salt, please contact our sales team through the website or by phone.
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