Product Overview

Sodium Metabisulfite (Na₂S₂O₅) is a versatile, sulfur-based inorganic compound recognized for its broad functionality across industrial, chemical, and water treatment sectors. As a technical-grade material, this compound serves as a critical reducing agent, preservative, and oxygen scavenger in a range of manufacturing and environmental applications. Its high solubility and reactive sulfite content make it indispensable for processes requiring precise redox control and contaminant mitigation.

This technical-grade sodium metabisulfite undergoes rigorous production controls to ensure optimal reactivity and consistency in industrial-scale systems. It is formulated to deliver reliable performance where high-volume chemical processing, environmental management, or surface treatment is involved. Its fast-reacting molecular profile supports a wide range of chemical processes, from flue gas scrubbing to the stabilization of sensitive compounds in industrial formulations.

Key Properties

• Chemical Formula: Na₂S₂O₅

• Molecular Weight: 190.10 g/mol

• Boiling Point: Decomposes before boiling

• Melting Point: ~150°C (302°F, decomposes)

• Solubility: Highly soluble in water

• Appearance: White to slightly yellow crystalline powder

• Odor: Pungent sulfur dioxide-like odor

• Stability: Stable under dry, cool conditions; releases SO₂ gas when wet

• pH (1% solution): ~4.0–5.5

Common Applications

• Water Treatment and Dechlorination:
  Sodium metabisulfite neutralizes residual chlorine and chloramines in municipal and industrial water systems, protecting downstream processes and sensitive equipment from oxidative damage.

• Industrial Cleaning and Sterilization:
  Utilized for pipeline and equipment sanitization, especially in food processing, pharmaceutical, and beverage industries, where its sulfite-based chemistry eliminates microbial contaminants and oxidants.

• Oxygen Scavenging in Boiler Systems:
  Acts as an effective oxygen scavenger to prevent corrosion in high-pressure steam generation systems by reducing dissolved oxygen to non-corrosive compounds.

• Flue Gas Desulfurization (FGD):
  Used to capture and neutralize sulfur dioxide emissions in environmental air pollution control systems, contributing to regulatory compliance and emissions reduction.

• Photographic and Pulp Bleaching:
  Employed as a mild reducing agent in film processing and in the paper industry for bleaching pulp and stabilizing color in finished products.

Safety Precautions

Sodium metabisulfite poses inhalation and skin sensitization risks, particularly in confined or poorly ventilated areas. Dust inhalation may cause respiratory irritation, and contact with moist skin or mucous membranes may lead to allergic reactions in sensitive individuals.

Always handle with appropriate PPE, including chemical-resistant gloves, safety goggles, and dust masks or respirators when airborne particulate may be present. Ensure local exhaust ventilation or fume hoods are used in enclosed spaces.

Store in a cool, dry, and well-ventilated location, away from acids, moisture, and oxidizers. Contact with water or acid releases sulfur dioxide (SO₂), which is a toxic gas — handle and store in accordance with all local and OSHA regulations.

Benefits

Our technical-grade sodium metabisulfite is formulated for industrial reliability and consistent performance, delivering high reactivity and purity tailored for demanding applications. It offers exceptional value in large-scale operations requiring dependable sulfite chemistry, from dechlorination and preservation to environmental control.

With strong batch-to-batch consistency, excellent solubility, and optimized particle size distribution, this material ensures predictable outcomes across various treatment and manufacturing systems. Whether for water purification, oxygen scavenging, or gas scrubbing, our sodium metabisulfite meets the technical expectations of modern industrial applications while adhering to responsible safety and handling standards.