2-Formylbenzenesulfonic acid sodium salt hydrate
2-Formylbenzenesulfonic acid sodium salt hydrate (CAS: 305808-14-4) is a sulfur-containing organic compound featuring both an aldehyde and a sulfonate group. With a molecular weight of 208.17 g/mol (anhydrous basis) and a linear formula of HCOC<sub>6</sub>H<sub>4</sub>SO<sub>3</sub>Na · xH<sub>2</sub>O, it serves as a valuable building block in organic synthesis. This technical grade material is primarily utilised in chemical synthesis and for the preparation of more complex organic molecules.
- IUPAC
- Benzaldehyde-2-sulfonic acid sodium salt
- Synonyms
- Benzaldehyde-2-sulfonic acid sodium salt

Organic Synthesis Building Block
This compound acts as a versatile building block in organic chemistry due to its dual functionality. The aldehyde group can participate in various condensation and addition reactions, while the sulfonic acid salt moiety influences solubility and reactivity.
Intermediate for Complex Molecules
It is employed as an intermediate in the synthesis of a range of organic compounds. Its structure allows for further derivatisation to create molecules with specific properties for research and development.
Carbonyl Chemistry
The presence of the formyl (aldehyde) group makes it suitable for reactions characteristic of carbonyl compounds, such as Schiff base formation, Wittig reactions, and reductions.
| Molecular weight | 208.17 (anhydrous basis) |
|---|---|
| Linear formula | HCOC6H4SO3Na · xH2O |
| Assay | 75% |
| Grade | technical grade |
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 2-Formylbenzenesulfonic acid sodium salt hydrate used for?
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2-Formylbenzenesulfonic acid sodium salt hydrate is primarily used as a building block and intermediate in organic synthesis, particularly in reactions involving carbonyl compounds.
What are the CAS number and formula for this compound?
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The CAS number is 305808-14-4, and its linear formula is HCOC<sub>6</sub>H<sub>4</sub>SO<sub>3</sub>Na · xH<sub>2</sub>O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies this chemical as technical grade with an assay of 75%. We do not represent it as meeting USP, BP, or EP pharmacopoeial standards.
What are the safety and handling considerations?
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This compound is classified under WGK 2 for Germany. Please consult the Safety Data Sheet (SDS) for comprehensive hazard information and recommended personal protective equipment (PPE) and handling procedures.
How is this product shipped or exported?
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Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals and reagents. Please contact us for specific shipping and export details.
How can I request a sample or quote?
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To request a sample or a quote, please use the contact form on our website or contact our sales department directly.
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