Sodium Metabisulfite
It is a chemical with the chemical formula Na2S2O5 a salt of metabisulfuric acid. Its use must take into account safety and environmental impact. Environmental impact: It can dissolve in water and may form sulfuric acid in the environment. Therefore, waste should be properly managed to prevent impact on the environment and living things.
Caution
Inhalation Move the victim to fresh air and keep them in a position comfortable for breathing. If symptoms worsen, Get medical attention.
Skin contact Remove contaminated clothing and shoes immediately. Flush with warm water for 15 minutes. If the contaminated area is extensive, pour water over clothing and body. If skin irritation occurs, Get medical attention.
Eye contact : Flush eyes with plenty of water, holding the eyelids wide open for at least 15 minutes, Get medical attention.
IngestionRinse mouth with clean water and drink plenty of water. Do not induce vomiting. Get medical attention.
Storage
Store in a place away from heat and humidity. The substance should be avoided or protected from shock, compression and scratching which may result in changes in the structure or properties of the substance. It should be stored separately from acids and oxidizing agents.
Product Specification
Product Name : Sodium metabisulfite
Molecule Formula : Na2S2O5
Appearance : White crystalline power
|
Parameter |
Specification |
|
1. Purity as Na2S2O5 |
Min 98.00% |
|
2. Sulfur Dioxide |
Min 66.05% |
|
3. Sodium sulfite |
Max 1% |
|
4. Sodium sulfate |
Max 1% |
|
5. Sodium chloride |
Max 50 ppm |
|
6. Insoluble water |
Max 0.03% |
|
7. Iron (Fe) |
Max 3 ppm |
|
8. Heavy metal (as Pb) |
Max 10 ppm |
|
9. pH 5% solution |
4.0-4.8 |
|
10. Arsenic (As) |
Max 1 ppm |
|
11. Selenium (Se) |
Max 1 ppm |
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Sodium Metabisulfite
| Other names | Sodium pyrosulfite, Sodium metabisulphite, Sodium pyrosulphite |
| Properties of Sodium metabisulfite | |
| Molecular formula | Na2S2O5 |
| Appearance | White or light yellow crystalline powder |
| Colour | White |
| Odour | The pungent smell of sulfur |
| Density | 1.48 g/cm3 |
| Melting point | 150 0C |
| Boiling point | ไม่พบข้อมูล |
| Chemical characteristics
Sodium metabisulfite |
The chemical formula Na2S2O5 has a molecular mass of approximately 190.11 g/mol and is slightly acidic when dissolved in water. |
| Solubility | Water soluble solids 45% or 650 g/l at 20 0C , soluble in glycerol and moderately soluble in ethanol. |
| Acidity | pH 4-4.5 at 5% solution |
| pH | pH 4-4.5 at 5% solution |
| Flash point | Not applicable |
| Application Sodium metabisulfite | |
| Industrial sector | |
| Food industry | It is a preservative and oxidant in food products such as dried fruits, grape juice
, bakery products to extend shelf life and prevent discoloration. |
| Alcoholic beverage production, | wine and beer making processes to control microbial growth and prevent oxidation. |
| Textile Industry and paper industry | It is used in dyeing and bleaching to reduce color formation and improve product quality. |
| Chemical industry | Used as a catalyst and reducing agent in various chemical reactions. |
| Cosmetic/Beauty Industry | Used in some products to control pH and prevent oxidation. |
| Hazard of Sodium metabisulfite | |
GHS
|
  |
 NFPA 704 |
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