Description

Calcium Sulfite is an inorganic salt widely utilized for its reducing and preservative properties. Its primary commercial value lies in its role as an effective oxygen scavenger and antioxidant, crucial for protecting sensitive materials from oxidative degradation. This makes it an essential chemical for industries such as food and beverage preservation, water treatment, and pulp and paper manufacturing. We supply high-purity Calcium Sulfite CAS NO 10257-55-3 to meet the stringent demands of global industrial applications.

Application

• Food & Beverage Industry: Used as a preservative (E226) and antioxidant to prevent spoilage and maintain color in wines, fruit juices, and canned goods.
• Water Treatment: Acts as a dechlorinating agent and oxygen scavenger in boiler feed water and wastewater treatment processes.
• Pulp & Paper Manufacturing: Employed in chemical pulping processes and as a bleaching agent to improve pulp brightness.
• Chemical Synthesis: Serves as a key intermediate and reducing agent in various organic and inorganic chemical production processes.
• Flue Gas Desulfurization (FGD): Used in some air pollution control systems to remove sulfur dioxide from industrial exhaust gases.
• Pharmaceuticals: Finds application as an excipient and in certain niche synthesis where its reducing properties are required.

Basic Information

Product Name	Calcium Sulfite
CAS No.	10257-55-3
Molecular Formula	CaSO3 or CaSO3·xH2O
Molecular Weight	120.14 g/mol (anhydrous basis)
Synonyms	Sulfurous acid, calcium salt (1:1); Calcium sulphite; E226; Preservative E226; Kalziumsulfit (German); Sulfite de calcium (French); Caswell No. 149
EINECS	233-596-8

Quality Control

Our Calcium Sulfite is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, composition, and physical properties. Certificates of Analysis (COA) are provided with every shipment. Production can be aligned with relevant standards such as Food Chemical Codex (FCC) for food-grade applications, ensuring reliable quality and supply chain integrity for our global partners.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is easily oxidized; prolonged exposure to air should be minimized to maintain efficacy. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (as CaSO3)	≥ 95.0 %
Water Insoluble Matter	≤ 0.5 %
Heavy Metals (as Pb)	≤ 10 ppm
Arsenic (As)	≤ 3 ppm
Loss on Drying	Contact for details

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