About this product
Sodium bisulphite (NaHSO3, CAS 7631-90-5) is a white crystalline powder, also spelled sodium bisulfite and known as sodium hydrogen sulphite or SBS. Buyers use it as a reducing agent and oxygen scavenger across water and effluent treatment, bleaching, and general chemical processing. We supply technical grade material in 50 kg HDPE bags as powder and in HDPE carboys as solution, sourced from producers including Aditya Birla Group, GACL and Tata Chemicals, and dispatch across South India from our Redhills warehouse in Chennai.
Applications & Uses
Safety & Technical Documents
MSDS / SDS
TDS / COA
Certificate of Analysis · with every supply, on request
Product DataTechnical Specifications
Physical Properties
- Appearance
- White crystalline powder
- Assay
- Available SO2, 35.0% min (mass)
- pH
- 4.0 – 5.5 (10% solution)
Supply & Packaging
- Packaging
- 50 kg HDPE bags (powder)HDPE carboys (solution)
- Grades Available
- Technical Grade
Compliance & Storage
- HS Code
- 2832 10 10
- Storage
- Store cool and dry, away from oxidisers and acids. Reacts with acids to liberate toxic sulphur dioxide gas.
These specs are indicative. Request a Certificate of Analysis (COA) for batch-specific values.
Source Manufacturers
Sourced directly from verified manufacturers for consistent quality and traceability.
Supplied across South IndiaCoimbatore · Madurai · Hosur · Bangalore · Hyderabad · Visakhapatnam · Kochi
Frequently Asked Questions
What is sodium bisulphite used for?
Sodium bisulphite is used mainly as a reducing agent and oxygen scavenger — in water and effluent treatment, dechlorination, chrome reduction, textile and paper bleaching, and as a raw material in dye and intermediate manufacturing. We stock it in Technical Grade as a white crystalline powder.
What is the CAS number and chemical formula of sodium bisulphite?
The CAS number is 7631-90-5 and the formula is NaHSO3. The HSN code we use for it is 2832 10 10.
Is sodium bisulfite the same as sodium bisulphite, and what does SBS stand for?
Yes — sodium bisulfite is simply the US spelling of sodium bisulphite. The same product is also called sodium hydrogen sulphite (or sodium hydrogen sulfite) and is commonly abbreviated SBS. You will see it written as Sodium Bi Sulphite in our catalogue and Sodium Bisulphite on the datasheets. Same material.
What is the difference between sodium bisulphite and sodium metabisulphite (SMBS)?
They are two distinct chemicals. Sodium bisulphite is NaHSO3 (CAS 7631-90-5); sodium metabisulphite is Na2S2O5 and is a separate product in our range, listed under Sodium Meta Bi Sulphite (SMBS). Tell us which one you need when you enquire and we will quote the right material.
What are the technical grade specifications of sodium bisulphite?
Our Technical Grade material is a white crystalline powder with available SO2 of 35.0% min (mass), iron (as Fe) 20 ppm max, heavy metals (as Pb) 10 ppm max, matter insoluble in water 0.05% mass max, and a pH of 4.0 to 5.5 in 10% solution. A full TDS and MSDS are published on the product page for download.
How is sodium bisulphite packed, and is it available in Chennai?
We supply the powder in 50 kg HDPE bags and the solution in HDPE carboys, stocked and dispatched from our Redhills warehouse in Chennai to buyers across South India. Store it cool and dry, away from oxidisers and acids — it reacts with acids to liberate toxic sulphur dioxide gas. For a quote, call or WhatsApp +91 86087 80096.
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Product Details
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