4-Sulfobenzoic acid potassium salt
4-Sulfobenzoic acid potassium salt (CAS: 5399-63-3), with the molecular formula KO3SC6H4CO2H and a molecular weight of 240.27 g/mol, is a potassium salt of sulfobenzoic acid. This compound serves as a valuable building block in organic synthesis and chemical research. Its structure, featuring both a sulfonic acid group and a carboxylic acid group, allows for diverse chemical transformations and applications in the development of new materials and compounds.

Organic Synthesis Intermediate
4-Sulfobenzoic acid potassium salt acts as a versatile intermediate in the synthesis of more complex organic molecules. Its functional groups can be readily modified to introduce sulfonate and carboxylate moieties into target compounds.
Chemical Research
This compound is utilised in academic and industrial research settings for exploring novel chemical reactions and developing new synthetic methodologies. It is a useful reagent for creating diverse chemical structures.
Building Block for Specialty Chemicals
The unique combination of functional groups makes it suitable as a building block for the creation of specialty chemicals, potentially including dyes, polymers, or functional materials.
| Molecular weight | 240.27 |
|---|---|
| Linear formula | KO3SC6H4CO2H |
| Assay | 95% |

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-Sulfobenzoic acid potassium salt used for?
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4-Sulfobenzoic acid potassium salt is primarily used as a building block in organic synthesis and for general chemical research purposes.
What are the CAS number and formula for 4-Sulfobenzoic acid potassium salt?
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The CAS number is 5399-63-3, and the linear formula is KO3SC6H4CO2H.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Sulfobenzoic acid potassium salt with an assay of 95%. This product is not represented as USP, BP, EP, or any other pharmacopoeia grade.
What are the safety and handling precautions for 4-Sulfobenzoic acid potassium salt?
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This compound is classified with GHS07 symbol and 'Warning' signal word, with hazard statements H315, H319, and H335. It causes skin irritation, serious eye irritation, and may cause respiratory irritation. Recommended personal protective equipment includes a dust mask type N95 (US), eyeshields, and gloves. Ensure adequate ventilation.
How is 4-Sulfobenzoic acid potassium salt typically packed and shipped?
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Tech Serve Solutions packs and ships fine chemicals like 4-Sulfobenzoic acid potassium salt according to industry standards and international export regulations to ensure safe transit.
How can I request a quote or sample for 4-Sulfobenzoic acid potassium salt?
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To request a quote or sample of 4-Sulfobenzoic acid potassium salt, please contact our sales department through the website or by phone.
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