Sodium Metabisulfite
Sodium Metabisulfite (SMBS, E223, CAS 7681-57-4), food and technical grade, supplied wholesale by Zyntex. Preservative and reducing agent for wine and food, water dechlorination, mining and pharmaceuticals. CoA and SDS.
Description
Sodium Metabisulfite Product Overview
Sodium metabisulfite (Na2S2O5) is a white crystalline powder with a sulfur dioxide odor that dissolves easily in water, forming sodium bisulfite. It releases sulfur dioxide in acidic conditions.
In addition, food and beverage producers use it (E223) to preserve wine, dried fruit, shrimp and juices and to prevent browning, within the limits set by food regulations. Similarly, water treatment users use it to remove chlorine before reverse osmosis membranes, mining companies use it in gold processing and flotation, pharmaceutical companies use it as an antioxidant in injections, and textile and leather processors use it as a reducing agent.
Notably, related sulfur compounds in our range include Ammonium Bisulfite and Sodium Bromide.
Key Applications of Sodium Metabisulfite
Typical uses include, for example:
🍷 Wine and Food
Preservative E223.
🚰 Water Treatment
Dechlorination before RO.
⛏️ Mining
Gold processing and flotation.
💊 Pharmaceuticals
Antioxidant in injections.
Sodium Metabisulfite Technical Specifications
| Parameter | Standard Value |
|---|---|
| Product Name | Sodium Metabisulfite (SMBS) |
| CAS Number | 7681-57-4 |
| E Number | E223 |
| Molecular Formula / Weight | Na2S2O5 / 190.11 g/mol |
| Assay | Min. 97% (SO2 approx. 65%) |
| Grades | Food and technical |
| Documents | CoA and SDS with every lot |
⚠️ Safety & Handling: Harmful if swallowed and causes serious eye damage; contact with acids releases toxic sulfur dioxide. Avoid dust and contact with acids, and also wear gloves, eye protection and dust protection. Store in tightly closed bags in a dry place. Always consult the Safety Data Sheet (SDS), because it contains the full classification and handling instructions.
Frequently Asked Questions
Why is sodium metabisulfite used in wine?
It releases sulfur dioxide, which protects wine from oxidation and microbes.
Which grades do you supply?
Food and technical grades.
How can I get a price and documents?
We supply flexible quantities, from small orders to large volumes, so you do not need to meet the high minimum orders of large producers. Please contact us with your required volume, and we will send a quotation together with the CoA and SDS.
