Description

Sulfur Dioxide CAS NO 89125-89-3 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, which are essential for process control and product stabilization. This highly volatile gas is indispensable for manufacturers in the food and beverage, water treatment, pulp and paper, and chemical synthesis sectors who require a reliable and high-purity source for their operations.

Application

• Food & Beverage Preservation: Used as an antioxidant and antimicrobial agent (E220) in wines, dried fruits, fruit juices, and other processed foods to prevent spoilage and browning.
• Water Treatment: Employed for dechlorination and as a reducing agent in municipal and industrial wastewater treatment processes.
• Pulp & Paper Manufacturing: Serves as a bleaching agent in the production of mechanical and chemical pulps.
• Chemical Synthesis: Acts as a key precursor and sulfonating agent in the production of sulfuric acid, sulfites, bisulfites, and other sulfur-containing chemicals.
• Refrigeration: Utilized as a refrigerant in industrial applications, particularly in large-scale systems.
• Winemaking: Critical for sanitization of equipment and barrels, and for controlling microbial growth and oxidation during fermentation and aging.
• Textile Processing: Applied as a bleaching and reducing agent in textile manufacturing.
• Fumigation: Used to fumigate stored grains, fruits, and other agricultural commodities to control pests and molds.

Basic Information

Product Name	Sulfur Dioxide
CAS No.	89125-89-3
Molecular Formula	SO2
Molecular Weight	64.066 g/mol
Synonyms	Sulfur oxide (SO2); Sulfurous anhydride; Sulfurous oxide; Sulfur(IV) oxide; Sulfur superoxide; Fermenticide liquid; Schwefeldioxid (German); Anhydride sulfureux (French); EINECS 231-195-2; EPA Pesticide Chemical Code 077601; UN 1079; R-764
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 reliability. We offer various grades, including industrial and food-grade (FCC/E220), meeting relevant purity specifications. A comprehensive Certificate of Analysis (COA) detailing assay, purity, and impurity profiles is provided with each shipment to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed, approved pressure container, stored in a cool, well-ventilated area away from direct sunlight and heat sources. Due to its highly volatile and gaseous nature under standard conditions, containers must be kept upright and secured. Store separately from incompatible materials such as strong oxidizers, strong bases, and moisture. Cylinder temperature should not exceed 52°C (125°F).

Specification

Item	Specification
Appearance	Colorless gas / Liquefied under pressure
Assay (SO2)	≥ 99.9%
Water (H2O)	≤ 0.05%
Non-volatile residue	≤ 0.02%
Acidity (as H2SO4)	≤ 0.02%
Sulfur Trioxide (SO3)	≤ 0.01%
Identification (IR)	Conforms

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