Sodium Metabisulfite — Food Grade

Name: Sodium Metabisulfite - Food Grade
Brand: Alliance Chemical
SKU: R7V-4DG-0MB
Availability: InStock

Description
Product Documents
Chemical Profile

Product Overview

Sodium Metabisulfite (Na₂S₂O₅), also known as Sodium Pyrosulfite, is a white crystalline powder widely used as a reducing agent and antioxidant. This Food Grade product is manufactured to meet rigorous purity standards (FCC), typically achieving a 99.5% assay. It is essential in food processing for preserving freshness and preventing enzymatic browning in fruits, vegetables, and beverages. Beyond food applications, it serves as a critical dechlorinating agent in water treatment and a reducing agent in chemical synthesis.

The material features a density of 1.48 g/mL (25°C) and is highly soluble in water, allowing for precise dosing in batch formulations. We supply this product in moisture-resistant packaging to prevent clumping and degradation, ensuring ease of handling for industrial operators and purchasing agents requiring consistent chemical specifications.

Key Properties

Chemical Formula: Na₂S₂O₅
CAS Number: 7681-57-4
Grade: Food Grade (FCC standards)
Assay: Min 98.0% (Typical 99.5%)
Appearance: White crystalline powder
Specific Gravity: 1.48 at 20°C
Solubility: Soluble in water
pH: Acidic in solution
Iron (Fe): Max 0.5 ppm
Lead (Pb): Max 0.2 ppm

Common Applications

Food Preservation: Inhibits enzymatic browning and oxidation in fruits, vegetables, and seafood processing.
Beverage Processing: Used as an antioxidant and preservative in wine making and fruit juice production.
Water Treatment: Functions as a dechlorinating agent to neutralize residual chlorine and reduce heavy metals in wastewater.
Chemical Manufacturing: Acts as a reducing agent in the purification of aldehydes and ketones.
Textile & Leather: Used in bleaching processes and as an antichlor.

Safety & Handling

Sodium Metabisulfite is corrosive and can release sulfur dioxide gas if in contact with acids. Store in a cool, dry, well-ventilated area away from moisture, oxidizing agents, and acids. Operators should utilize appropriate Personal Protective Equipment (PPE), including chemical-resistant gloves, safety goggles, and respiratory protection if dust is present.

Refer to the Safety Data Sheet (SDS) for detailed spill response and first aid protocols. This product is regulated for transport (UN 1759, Class 8) and must be handled in compliance with local industrial safety regulations.

Benefits

High Purity: Meets Food Chemicals Codex (FCC) specifications for use in consumable products.
Effective Oxidation Control: Prevents spoilage and color loss in sensitive materials.
Versatile Packaging: Available in sizes ranging from lab-scale to bulk production quantities.

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Frequently Asked Questions About Sodium Metabisulfite - Food Grade

What is Sodium Metabisulfite - Food Grade and what is its chemical formula?

Sodium Metabisulfite - Food Grade is a chemical compound. Alliance Chemical supplies Sodium Metabisulfite - Food Grade for laboratory, industrial, and commercial applications.

What are common industrial applications of Sodium Metabisulfite - Food Grade?

Sodium Metabisulfite - Food Grade has applications in laboratory research, manufacturing, and industrial processing.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.

What PPE is required when handling Sodium Metabisulfite - Food Grade?

OSHA-mandated PPE per 29 CFR 1910.132-138:Chemical-resistant gloves (nitrile/neoprene), safety goggles, lab coat, closed-toe chemical-resistant footwear. Emergency eyewash station and safety shower must be accessible within 10 seconds per ANSI Z358.1. Consult the SDS available from Alliance Chemical for complete PPE requirements.

What are the storage requirements for Sodium Metabisulfite - Food Grade?

Store perOSHA standards: Cool, dry, ventilated area. Temperature range:15-25°C. Segregate from:incompatible materials per SDS Section 10. Maximum storage:2-3 years unopened.

What is the emergency spill procedure for Sodium Metabisulfite - Food Grade?

Emergency response per EPA SPCC (40 CFR 112) and OSHA 29 CFR 1910.120: (1) Alert personnel, evacuate area to 50 feet. (2) Eliminate ignition sources if flammable. (3) Don PPE per SDS Section 8. (4) Stop leak if safe; use emergency shutoffs. (5) Contain with non-combustible absorbent materials, dike with sand/earth. (6)Absorb with vermiculite or commercial spill kits. (7) Collect in DOT-approved containers, label as hazardous waste. Check 40 CFR 302.4 for Reportable Quantity. Emergency: Chemtel 1-800-255-3924 (24/7). Non-emergency: Alliance Chemical 512-365-6838.

How must Sodium Metabisulfite - Food Grade waste be disposed?

Disposal per RCRA (40 CFR 261-265):Evaluate per 40 CFR 261. Generator requirements: EPA ID number required if >100 kg/month (40 CFR 262.12). Use EPA-permitted Treatment, Storage, Disposal Facility (TSDF). Never discharge to sewer without POTW written approval (40 CFR 403). Container disposal: Triple rinse (40 CFR 261.7), offer for reconditioning/recycling. State regulations may be more stringent — check with your local environmental agency. Consult the Alliance Chemical SDS for product-specific disposal guidance.

Does Alliance Chemical provide an SDS and COA for Sodium Metabisulfite - Food Grade?

Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Sodium Metabisulfite - Food Grade. The SDS is prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and the Globally Harmonized System (GHS) Revision 7, covering all 16 required sections including hazard identification, first aid measures, firefighting measures, handling and storage, exposure controls, and regulatory information. The SDS is available for download directly from this product page. COAs are available upon request by contacting Alliance Chemical at 512-365-6838.