SODIUM BISULFITE- ▸ Reducing and scavenging: Oxygen scavenger and reducing agent for water and boiler systems.
- ▸ Bleaching: Bleaching agent for wood pulp, wool, and textiles.
- ▸ Dechlorination: Removes residual chlorine in water and effluent treatment.
- ▸ Antioxidant and preservative: Antioxidant and preservative in industrial and food-grade uses.
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Transport classification per the UN Model Regulations / 49 CFR 172.101 Hazardous Materials Table. Confirm against the grade-specific SDS (Section 14) before shipping.
Sodium bisulfite (CAS 7631-90-5), NaHSO3, is a reducing-agent salt commonly supplied in solution. It is used as a reducing and oxygen-scavenging agent, a bleaching agent for wood pulp and textiles, an antioxidant and preservative, a dechlorinating agent in water treatment, and a processing aid in dyeing and tanning.
Frequently Asked Questions
What is sodium bisulfite used for?
Sodium bisulfite (CAS 7631-90-5, NaHSO3), commonly supplied in solution, is used as a reducing and oxygen-scavenging agent for water and boiler systems, a bleaching agent for wood pulp and textiles, a dechlorinating agent that removes residual chlorine in water and effluent treatment, and an antioxidant and preservative.
Is baking soda the same as sodium bisulfite?
No. Baking soda is sodium bicarbonate (NaHCO3), an alkali. Sodium bisulfite is NaHSO3 (CAS 7631-90-5), an acidic reducing-agent salt. Note also that sodium bisulfite differs from sodium bisulfate (NaHSO4); the three are distinct chemicals.
What is the pH of sodium bisulfite?
Sodium bisulfite solutions are acidic, consistent with its role as a reducing and dechlorinating agent. Exact solution pH varies with concentration and is documented on the SDS.
How is sodium bisulfite shipped and what is the UN number?
Sodium bisulfite is assigned UN 3260 and ships under DOT/IMDG hazmat rules with appropriate packaging and documentation. It classifies under HS 2832.10 (sodium sulfites). Our team coordinates compliant shipping for each order.
How is sodium bisulfite supplied and priced in bulk?
We supply sodium bisulfite, commonly as solution, in industrial quantities with CoA and SDS per lot. Bulk pricing depends on concentration, packaging, and volume; request a bulk quote for current pricing and lead time.
