Sodium bisulfite
Sodium bisulfite (CAS 7631-90-5) is a versatile inorganic salt with the chemical formula NaHSO3. It functions as a reducing agent and a source of sulfur dioxide. This compound finds widespread use in chemical synthesis, water treatment, and as a preservative in various industrial applications due to its reducing and bleaching properties. Tech Serve Solutions supplies high-quality sodium bisulfite suitable for research and industrial purposes.
- IUPAC
- Sodium hydrogen sulfite
- Synonyms
- Sodium hydrogen sulfite
Chemical Synthesis
Sodium bisulfite serves as a reducing agent in organic synthesis, facilitating various chemical transformations. It is also used in the preparation of other sulfur-containing compounds.
Water Treatment
It acts as a dechlorinating agent in wastewater treatment, effectively removing residual chlorine. Sodium bisulfite is also employed to reduce hexavalent chromium to the less toxic trivalent form.
Industrial Preservative
This compound is used as a preservative in certain industrial processes to prevent oxidation. Its reducing properties help to stabilize formulations and extend shelf life.
Bleaching Agent
Sodium bisulfite can be utilized as a bleaching agent in various industries, including textiles and paper manufacturing, to remove colour impurities.
| Assay | ~40% |
|---|---|
| Grade | ACS reagent |
| Impurities tested | ≤0.005% insolubles |
Hazard statements
- H302Harmful if swallowed
- H318Causes serious eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-31-41 |
| Safety statements (S) | 26-39 |
| Supplemental hazards | Contact with acids liberates toxic gas. |
| Cation traces | Fe: ≤0.002%heavy metals (as Pb): ≤0.001% |
| Anion traces | chloride (Cl-): ≤0.02% |
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 Sodium Bisulfite used for?
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Sodium bisulfite is used in chemical synthesis, water treatment (dechlorination and chromium reduction), as an industrial preservative, and as a bleaching agent.
What is the CAS number and formula for Sodium Bisulfite?
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The CAS number for Sodium Bisulfite is 7631-90-5. The chemical formula is NaHSO3.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Sodium Bisulfite in ACS reagent grade with an assay of approximately 40% and ≤0.005% insolubles. We do not represent this product as USP, BP, or EP grade.
How should Sodium Bisulfite be handled safely?
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Sodium bisulfite is classified as Dangerous Goods. It is harmful if swallowed and causes serious eye damage. Contact with acids liberates toxic gas. Always wear appropriate personal protective equipment, including a dust mask (type N95 US), eyeshields, and gloves. Ensure good ventilation and avoid contact with acids.
Is Sodium Bisulfite a controlled substance?
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This product is not listed as a controlled substance in the provided data.
How is Sodium Bisulfite packed, shipped, and exported?
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Sodium Bisulfite is shipped as UN 3077, Class 9, Packing Group III. Specific packaging details are available upon request.
How can I request a sample or quote for Sodium Bisulfite?
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Please contact our sales team through the website to request a sample or obtain a quotation for Sodium Bisulfite.
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