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Sodium Metabisulfite (Na₂S₂O₅), also known as Sodium Metabisulfite or Sodium Pyrosulfite, is a strong reducing agent widely used in food (E223), water treatment, Textile Dyeing, mining, winemaking, and paper and pulp production. This chemical is a white powder with a mild sulfur odor; it is easily soluble in water and is used for bleaching, as an antioxidant, for disinfection, and as a food preservative.
With a wide range of applications, sodium metabisulfite is widely used in Wastewater Treatment, food production, seafood processing, precious metal mining, and textile industries. Loc Thien Chemicals is proud to be a supplier of genuine Sodium Metabisulfite, offering competitive prices and fast nationwide delivery.
Product name: Sodium metabisulfite (SBS)
Also known as: Sodium metabisunfit, Natri metabisunfit, Natri pyrosulfit
Chemical formula: Na₂S₂O₅
CAS 7681-57-4
Origin: Italy, China, Germany
Packaging specifications: 25kg/bag
What is sodium metabisulfite?
Sodium Metabisulfite, also known as Natri Metabisunfit (Na₂S₂O₅) or Sodium Pyrosulfite, is a inorganic chemical compound has strong reducing properties and is commonly used as food preservatives, industrial bleaching agents, and antioxidants in many fields.
In the form of white powder or orthorhombic crystals, Sodium Metabisulfite có a faint smell of sulfur distinctive and easy soluble in water, tạo ra weakly acidic solution. When in contact with high temperatures or strong acids, this chemical SO₂ emissions, making it suitable for use in water treatment, food preservation, and wine production.
Is sodium metabisulfite toxic?
Na₂S₂O₅ is non-toxic when use the correct dosage, but may cause irritation to the eyes, skin, and respiratory system if there is direct contact with High content. When used in food, The content / purity must comply with European Standard E223 to ensure safety.
Physical and Chemical Properties of Sodium Metabisulfite:
Physical properties of sodium metabisulfite:
Ngoại quan: Exists in the form of white powder or small white crystals, dissolves quickly in water.
Melting point:150°C (302°F), nhưng easily decomposes when exposed to high temperatures, producing SO₂ gas with a distinctive odor.
Boiling point: There is no definite boiling point because it is thermal decomposition before it reaches a boil.
Solubility:Highly soluble in water, a mildly acidic solution, widely used in Wastewater Treatment and food processing.
Specific gravity:1.48 g/cm³, making it easy to control the concentration when mixing.
Stability Stability in dry, well-ventilated conditions, but may be absorbs moisture and clumps when exposed to air.
Odor: It has a faint sulfur odor; when it reacts with a strong acid, it forms SO₂ causes eye irritation and respiratory irritation.
🟢 Practical applications: Thanks to these properties, sodium metabisulfite is widely used in boiler water treatment, the food industry, and Textile Dyeing.
Chemical Properties of Sodium Metabisulfite:
Reaction with strong acids: Gas Release SO₂ has strong reducing properties
Na2S2O5+2HCl→2NaCl+H2O+2SO2
Thermal decomposition reaction: When heated, sodium metabisulfite decomposes into Sodium Oxide and Sulfur Dioxide Gas
Na2S2O5→Na2O+2SO2
Reaction with water: Form a solution axit yếu and release sulfur dioxide (SO₂)
Na2S2O5+H2O→2SO2+2NaOH
Chemical molecular formula Na₂S₂O₅
Preparation of Sodium Metabisulfite:
The production process for sodium metabisulfite is based on the process oxy hóa Natri Bisulfite (NaHSO₃) with oxygen or SO₂ gas:
2NaHSO3+O2→Na2S2O5+H2O
Production steps:
Reaction phase: Sodium bisulfite reacts with gas SO₂ to produce sodium metabisulfite.
Cleaning: The post-reaction solution is purified to remove impurities.
Kết tinh: The liquid is evaporated to form tinh thể Sodium Metabisulfite.
Packaging: The product is dried, finely ground, and packaged in bags 25kg/bag.
Applications of sodium metabisulfite:
Sodium Metabisulfite is a chemical multifunctional, which is widely used in many industries:
Food Industry (E223)
Food preservatives: Helps extend shelf life seafood, dried fruits and vegetables, fruit juice.
Antioxidants: Limitations food color changes during storage.
Applications in beer and wine production: Giữ authentic flavor, preventing bacteria from growing during the fermentation process.
Reducing Oxidation in Boiler Water, helping to protect equipment and pipes from corrosion.
Textile dyeing industry
Fabric Bleach: Applications in processing cotton, wool, silk Before dyeing.
Dye Decolorization: Reuse wastewater to reduce environmental pollution.
Paper industry
Paper Pulp Bleaching: Applications in manufacturing premium paper and toilet paper.
White Balance: Prevent yellowing over time.
Mining Industry
Recovery of Precious Metals: Dùng trong extraction of gold and silver from ore.
Used as a reducing agent in metallurgy: Helps remove oxidizing impurities from metal.
📌 Important note: When using sodium metabisulfite in Food and Water Treatment, cần comply with safety standards to avoid any adverse health effects.
Storage Instructions for Sodium Metabisulfite
Store in a dry, cool, well-ventilated place, away from direct light.
Seal the package tightly after use to prevent moisture absorption and clumping.
Avoid contact with strong oxidizing agents (such as hydrogen peroxide and nitric acid).
Keep away from heat sources to prevent thermal decomposition.
Do not store with food or flammable or explosive substances.
Where can I buy sodium metabisulfite from a reputable source?
Are you looking to buy high-quality Sodium Metabisulfite at a great price with fast delivery? 🛒 Loc Thien Chemicals—a supplier of Sodium Metabisulfite imported directly from Italy, Germany, and China—guarantees:
Products imported directly from Italy, China, and Germany
To purchase Natri metabisunfit High quality at a great price—customers should come right away Loc Thien Company. We are committed to always providing our customers with the highest-quality products, the most competitive prices, and the best service. In particular, when you purchase Na₂S₂O₅ from us, you’ll also receive free consultation from our team.
Customers who wish to purchase Sodium metabisulfite Please contact our hotline: 0979 891 929 or visit the website:hoachatlocthien.com to receive consultation, a quote, and the fastest possible delivery.
Loc Thien Investment and Development Co., Ltd. is a Vietnam-based industrial chemical supplier. We focus on process-grade supply, logistics support and quotation on request.
Address: 452/6B Provincial Road 10, Binh Tri Dong Ward, Ho Chi Minh City
Số CAS / Entity: CAS Number: 7681-57-4 (Sodium Metabisulfite). Imported Na₂S₂O₅ chemical in 25-kg bags, complete with COA and MSDS.
English Name / Industry Designation: Commercial names: sodium metabisulfite, sodium pyrosulfite, SMBS (sodium metabisulfite Na₂S₂O₅, 25 kg bags). Selling sodium metabisulfite (Na₂S₂O₅) in 25 kg bags at low prices; distributing sodium metabisulfite (Na₂S₂O₅) in 25 kg bags nationwide.
Frequently Asked Questions
What is the form and packaging specification of sodium metabisulfite (Na₂S₂O₅)?
A white or slightly yellow crystalline powder with a faint, pungent SO₂ odor; content / purity of Na₂S₂O₅ ≥ 97%; packed in 25-kg bags.
What are the main uses of Na₂S₂O₅ in the water treatment industry?
Used to remove residual Chlorine from water, for Wastewater Treatment of chromium VI, and as an antioxidant.
Does the 25 kg/bag Na₂S₂O₅ come with a certified COA?
We have all the necessary factory COAs and Material Safety Data Sheets (MSDS).
How should sodium metabisulfite be stored safely?
Store in a dry, well-ventilated place; reseal the package tightly after use; avoid contact with strong acids, which can produce toxic gases.
What is the price of sodium metabisulfite (Na₂S₂O₅) at Loc Thien?
Call our hotline at 0979 891 929 to get the best bulk prices on the market.
