Sodium Bisulfite

Basic Information of Sodium Bisulfite

CAS No.:	7631-90-5
EC No.:	231-548-0
Linear Formula:	NaHSO₃
Molecular Weight:	104.06
Appearance:	White crystalline powder or granular solid; also available as a clear, colorless to yellowish aqueous solution.
Melting point:	150 °C
Density:	1.48
Solubility:	Highly soluble in water, forming an acidic solution. Slightly soluble in ethanol.
Nature:	Reducing agent. Hygroscopic. May release sulfur dioxide gas in acidic conditions.
RIDADR:	UN 2693 8/PG 3
Chemical Structure:

Our commitment to delivering high-purity Sodium Bisulfite ensures a reliable and efficient component for your critical processes.

Primary Applications of Sodium Bisulfite (NaHSO₃)

Sodium Bisulfite's strong reducing capabilities and its versatility make it an incredibly valuable and widely used compound with applications across numerous industries:

1. Food and Beverage Preservative (E222):

   It is widely used as a food additive (E222) to prevent spoilage, inhibit enzymatic browning, and control microbial growth in fruits, vegetables, wines, beers, and other food products. It acts as an antioxidant and antimicrobial agent.

2. Water Treatment:

   Sodium Bisulfite is an effective dechlorinating agent used to remove residual chlorine and chloramines from drinking water, wastewater, and industrial process water, especially before discharge or further treatment steps (e.g., reverse osmosis).

3. Pulp and Paper Industry:

   In the pulp and paper industry, it is used as a bleaching agent for mechanical pulps, a reducing agent, and a sulfurizing agent in pulping processes.

4. Textile Industry:

   It finds application in the textile industry as a bleaching agent for natural fibers (like wool and cotton) and as a reducing agent in dyeing processes.

5. Pharmaceutical and Chemical Synthesis:

   Sodium Bisulfite is a key reducing agent and intermediate in the synthesis of various pharmaceutical compounds, fine chemicals, and other organic chemicals.

6. Photographic Industry:

   It is used as a preservative in photographic developers and as a fixing agent.

7. Odor Control:

   It can be used to remove excess chlorine and sulfur dioxide from gas streams and solutions, aiding in odor control.

• Exceptional Purity & Consistency: Our Sodium Bisulfite is manufactured to stringent purity specifications, crucial for maximizing effectiveness in sensitive applications like food preservation and ensuring consistent performance in industrial processes.

• Commitment to Quality & Safety: We adhere to the highest industry standards for quality management, safety, and environmental responsibility across all our operations, ensuring peace of mind for our clients.

Hazards Classification

• GHS Classification: Acute Toxicity (GHS06), Corrosive (GHS05), Exclamation Mark (GHS07)

• Hazard Statements: Harmful if swallowed; causes serious eye damage; may cause respiratory irritation; may cause skin irritation.

• UN Number: UN 2693

• Hazard Class: 8 (Corrosive Substances)

• Packing Group: III