Description

Sulfur Dioxide (SO₂) is a critical inorganic chemical compound widely used as a versatile reagent and preservative across multiple industries. Its primary value lies in its potent reducing, bleaching, and antimicrobial properties, making it indispensable for purification and stabilization processes. Key industrial users include manufacturers in food & beverage, water treatment, pulp & paper, and chemical synthesis who require a reliable supply of high-purity gas or liquefied product.

Application

• Food & Beverage Preservation: Used as an antimicrobial agent and antioxidant to prevent spoilage and browning in dried fruits, wines, and fruit juices.
• Water Treatment: Employed for dechlorination and as a reducing agent in wastewater treatment processes.
• Chemical Synthesis: Serves as a key precursor and sulfonating agent in the production of sulfuric acid, sulfites, and other sulfur-containing chemicals.
• Pulp & Paper Industry: Utilized in the bleaching process of wood pulp to produce paper products.
• Refrigeration: Acts as a refrigerant in industrial cooling systems and as a component in certain refrigerant blends.
• Wine Making: Critical for sanitization of equipment and as an antioxidant to control microbial growth and preserve flavor.
• Petroleum Refining: Used in alkylation and other refining processes to treat petroleum fractions.
• Fumigation: Applied for disinfecting and fumigating storage facilities and food processing areas.

Basic Information

Product Name	Sulfur Dioxide
CAS No.	7446-09-5
Molecular Formula	SO₂
Molecular Weight	64.06 g/mol
Synonyms	Sulfur oxide (SO2); Sulfurous anhydride; Sulfurous oxide; Sulfur(IV) oxide; Sulphur dioxide; Fermenticide liquid; E220 (food additive); EPA Pesticide Chemical Code 077601; UN 1079
EINECS	231-195-2

Quality Control

Our Sulfur Dioxide is produced and handled under stringent quality management protocols to ensure batch-to-batch consistency and high purity. Quality is verified through comprehensive analytical testing, including gas chromatography (GC) and titration methods, to meet relevant industry and food-grade specifications where applicable. A Certificate of Analysis (COA) detailing purity, moisture content, and other critical parameters is provided with each shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed, approved pressure container, protected from light and heat. Store in a cool, well-ventilated area away from direct sunlight and incompatible materials such as strong bases, strong oxidizing agents, and moisture. Cylinders should be secured upright and storage areas must comply with all local and national regulations for hazardous gases. Keep container valve closed when not in use.

Specification

Item	Specification
Appearance	Colorless gas / Liquefied under pressure
Odor	Pungent, irritating
Assay (SO₂)	≥ 99.9%
Water (H₂O)	≤ 50 ppm
Non-volatile residue	≤ 10 ppm
Sulfur trioxide (SO₃)	≤ 50 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.