Sodium Carbonate
Synonyms: Soda Ash, Washing Soda, Disodium Carbonate
CAS No.: 497-19-8
Molecular Formula: Na₂CO₃
Molecular Weight: 105.99 g/mol
1. Product Description
Sodium Carbonate is a white, odorless, water-soluble alkaline powder or granular solid, commonly known as soda ash. It is widely used as a pH regulator, buffering agent, neutralizing agent, and cleaning additive in industries such as food, detergent, glass, chemicals, and water treatment.
2. Specifications
| Parameter | Food Grade | Industrial Grade |
|---|
| Appearance | White crystalline powder or granules | White crystalline powder or granules |
| Assay (as Na₂CO₃, %) | ≥ 99.2 | ≥ 98.5 |
| pH (1% solution) | 11.2 – 11.6 | 11.0 – 11.6 |
| Loss on Drying (105 °C, 2 h) | ≤ 0.5 % | ≤ 1.0 % |
| Chloride (as Cl⁻, %) | ≤ 0.4 % | ≤ 0.5 % |
| Iron (Fe, ppm) | ≤ 10 | ≤ 50 |
| Heavy Metals (as Pb, ppm) | ≤ 5 | ≤ 20 |
| Sulphate (as SO₄²⁻, %) | ≤ 0.05 | ≤ 0.1 |
| Water Insoluble Matter | ≤ 0.05 % | ≤ 0.1 % |
| Bulk Density | 0.9 – 1.1 g/cm³ | 0.9 – 1.1 g/cm³ |
| Total Plate Count (cfu/g) | ≤ 1000 | — |
| Yeast & Mold (cfu/g) | ≤ 100 | — |
| E. coli / Salmonella | Negative | — |
3. Applications
Food Industry: pH regulator, leavening agent, acidity controller, processing aid
Water Treatment: Alkalinity agent, neutralizer
Glass Manufacturing: Flux to reduce melting temperature of silica
Detergents & Cleaning Products: Builder and pH stabilizer
Chemical Industry: Intermediate in production of sodium salts and other chemicals
Pharmaceuticals: Buffering and neutralizing agent
4. Physical & Chemical Properties
| Property | Value |
|---|
| Appearance | White crystalline or granular powder |
| Odor | Odorless |
| Taste | Strongly alkaline |
| Solubility | Freely soluble in water, insoluble in ethanol |
| Density | 2.53 g/cm³ |
| Melting Point | 851 °C |
| Boiling Point | Decomposes before boiling |
| pH (1% solution) | 11.2 |
| Stability | Stable under dry conditions; hygroscopic |
5. Storage & Handling
Store in a cool, dry, and well-ventilated area.
Keep packaging tightly closed to prevent moisture absorption and CO₂ contamination.
Avoid contact with acids.
Shelf Life: 24 months under recommended conditions.
6. Packaging
| Grade | Packaging |
|---|
| Food Grade | 25 kg PE-lined paper bag or 50 lb kraft bag |
| Industrial Grade | 25 – 50 kg woven bag or 1000 kg jumbo bag |
| Customized Packaging | Available upon request |
7. Safety Information
Hazard Classification: Irritant (eye, skin, respiratory tract)
Precautions: Avoid dust formation; wear gloves, goggles, and mask.
Spillage: Collect mechanically and rinse area with water.
Environmental Impact: Not bioaccumulative; large quantities may raise water pH.
8. Compliance
Food Grade: Complies with FCC / E500 (Sodium Carbonate)
Pharma Grade: Meets USP / EP standards (on request)
Industrial Grade: Conforms to GB/T 210.1–2018
For more information, please visit this website：https://www.khonorchem.com
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