Product Overview

Sodium Metabisulfite (Na₂S₂O₅) – ACS Grade is a high-purity, reagent-grade inorganic compound designed for use in laboratory, analytical, and high-precision industrial environments. Known for its powerful reducing and antioxidant properties, this ACS-certified material meets or exceeds the stringent specifications of the American Chemical Society (ACS), making it ideal for use in analytical chemistry, pharmaceutical synthesis, reagent preparation, and water purification where precision and reliability are critical.

Produced under tightly controlled manufacturing conditions, our ACS-grade sodium metabisulfite ensures exceptional chemical purity, low trace metal content, and consistent reactivity. Its highly soluble and reactive sulfite profile supports a wide range of controlled chemical processes that demand trace-level performance with minimal contamination risk.

Key Properties

• Chemical Formula: Na₂S₂O₅

• Molecular Weight: 190.10 g/mol

• Purity: ≥ 97% (ACS Specification)

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

• Solubility: Easily soluble in water

• Appearance: White, free-flowing crystalline powder

• Odor: Slight sulfur dioxide (SO₂) odor

• SO₂ Release Potential: Approx. 67% by weight

• Compliance: Conforms to ACS Reagent Specifications

Common Applications

• Analytical Chemistry and Reagent Formulation:
  Utilized as a high-purity reducing agent in titrations, trace metal analyses, and solution preparation where analytical accuracy and reproducibility are essential.

• Pharmaceutical and Biotech Synthesis:
  Applied as a controlled antioxidant and stabilizer in sensitive synthetic pathways and formulation processes, ensuring product stability and preventing oxidative degradation.

• Laboratory-Scale Water Dechlorination:
  Used to neutralize residual chlorine or chloramine in high-purity water systems and experimental setups, protecting sensitive analytical equipment and biological assays.

• Sample Preservation and Deoxygenation:
  Employed to maintain sample integrity in microbiological and environmental testing, particularly in cases where oxidative degradation must be minimized.

• Photographic and Electron Microscopy Prep:
  Acts as a stain-fixative and reducing agent in specialized photographic development and electron microscopy protocols requiring ultra-clean reagents.

Safety Precautions

Although ACS-grade sodium metabisulfite is highly refined, it retains the reactive properties of sulfites and should be handled with care. Exposure to moisture or acids can release sulfur dioxide (SO₂) gas, which is irritating to the respiratory tract and mucous membranes.

Use only in well-ventilated areas, and always wear appropriate PPE, including lab gloves, goggles, and protective lab clothing. Avoid inhalation of dust, and store in tightly sealed containers to prevent moisture absorption and degradation.

Comply with all applicable laboratory safety protocols (OSHA, NFPA, and institutional guidelines) for handling strong reducing agents and volatile sulfur compounds.

Benefits

Our ACS-grade Sodium Metabisulfite provides ultra-reliable performance and analytical-grade purity for demanding laboratory and industrial applications. Each batch is tested against ACS reagent specifications, ensuring suitability for trace-level analytical work, controlled synthesis, and sensitive sample environments.

With high solubility, minimal contaminant levels, and excellent stability under dry conditions, this product offers the ideal balance of reactivity and precision. Whether used in reagent formulation, quality control labs, or pharmaceutical development, our sodium metabisulfite meets the highest standards for scientific and technical excellence.