Formaldehyde-sodium bisulfite adduct
Formaldehyde-sodium bisulfite adduct (CAS 870-72-4) is a chemical compound represented by the formula HOCH2SO3Na with a molecular weight of 134.09 g/mol. This adduct serves as a valuable reagent in chemical synthesis, particularly within organic chemistry. It is widely employed as a building block for creating more complex organic molecules and falls under the category of sulfur compounds and organic sulfates/sulfites.
- IUPAC
- Sodium formaldehyde bisulfite
- Synonyms
- Sodium formaldehyde bisulfite

Organic Synthesis
This adduct functions as a versatile building block in organic synthesis. Its structure allows for incorporation into various molecular frameworks, facilitating the construction of complex organic compounds.
Sulfur Compound Chemistry
As a sulfur compound, it is useful in reactions where the introduction of a sulfur-containing moiety is desired. It is employed in studies and applications involving organic sulfates and sulfites.
Reagent in Chemical Processes
The compound is utilised as a specific reagent in various chemical processes where its unique reactivity profile is advantageous. It is a key intermediate for further chemical transformations.
| Molecular weight | 134.09 |
|---|---|
| Linear formula | HOCH2SO3Na |
| Assay | 95% |
| Melting point | 200 °C (dec.)(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
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 Formaldehyde-sodium bisulfite adduct used for?
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Formaldehyde-sodium bisulfite adduct (CAS 870-72-4) is primarily used as a building block in organic synthesis and as a reagent in chemical processes involving sulfur compounds, organic sulfates, and sulfites.
What is the CAS number and formula for Formaldehyde-sodium bisulfite adduct?
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The CAS number is 870-72-4, and its linear formula is HOCH2SO3Na.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Formaldehyde-sodium bisulfite adduct with an assay of 95%. This product is typically supplied for research and laboratory use. TSS does not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should Formaldehyde-sodium bisulfite adduct be handled safely?
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Handling requires appropriate personal protective equipment, including eyeshields and gloves. A respirator filter, such as type N95 (US) or type P1 (EN143), should be used. The compound has a WGK Germany rating of 3, indicating it is hazardous to water.
Is Formaldehyde-sodium bisulfite adduct a controlled substance?
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Based on the provided data, Formaldehyde-sodium bisulfite adduct (CAS 870-72-4) is not indicated as a controlled substance.
How is Formaldehyde-sodium bisulfite adduct packed and exported?
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Formaldehyde-sodium bisulfite adduct is carefully packed to ensure stability and safety during transit. TSS is a specialist global supplier and exporter of fine chemicals, pharmaceutical intermediates, and laboratory reagents.
How can I request a quote or sample?
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To request a quote or a sample of Formaldehyde-sodium bisulfite adduct, please contact the TSS sales team through our website or by calling our direct line.
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