🧴 Product Name:
Sodium Sulfite
🔬 Scientific Name:
Sodium Sulfite
🏷️ Trade Names:
Sodium Sulfite, Anhydrous Sodium Sulfite, E221, Sulfur Salt
⚛️ Chemical Formula:
Na₂SO₃
🧾 CAS Number:
7757-83-7
📦 HS Code:
2832.10
📘 Description:
Sodium sulfite is a white, water-soluble powder with strong reducing and antioxidant properties. It is widely used in paper making, water treatment, food preservation, textiles, and photography.
⚗️ Physical & Chemical Properties:
| Property | Value |
| Appearance | White crystalline powder |
| Density | 2.63 g/cm³ |
| Solubility in Water | High |
| pH (10% solution) | 9 – 10 |
| Odor/Taste | Odorless, slightly sulfurous |
🧪 Production Process:
Made by reacting sulfur dioxide (SO₂) with sodium hydroxide or sodium carbonate.
🧯 Safety & Handling:
- Hazards: Can irritate eyes and skin. May be harmful if swallowed in large amounts.
- Precautions: Use gloves and safety glasses. Store in a dry, cool place.
- Packaging: 25/50 kg moisture-proof bags
- Transport: Non-hazardous
📊 Grades & Applications:
| Grade Type | Purity | Form | Applications |
| Industrial | ≥ 97% | Powder | Paper industry, textiles, water treatment |
| Food Grade | ≥ 98.5% | Powder | Antioxidant preservative (E221) |
| Photographic | ≥ 99% | Powder | Film fixing in photographic processing |
🌍 Exporting Countries:
China, India, Germany, Turkey
🌎 Importing Countries:
Iran, Egypt, Iraq, Saudi Arabia, Pakistan
🔎 SEO Keywords:
Sodium sulfite powder, food preservative E221, photographic sulfite, industrial sodium sulfite, Na₂SO₃ price
