Back to Blog
2025
SODIUM CARBONATE ANHYDROUS (SODA ASH LIGHT)
Chemical name: Sodium Carbonate Anhydrous
CAS No.: 497-19-8
Molecular formula: Na2CO3
Standard executed: GB/T210.2-2004
Packaging: in 40KG/50KG/750KG PP woven bag with PE liner
Technical specification
| Items | Standards: TOP | Standards: 1st | Standards: 2nd |
|---|---|---|---|
Purity (Na2CO3),% dry | ≥99.2 | ≥98.8 | ≥98.0 |
Purity (Na2CO3),% wet | ≥97.9 | ≥97.5 | ≥96.7 |
NaCl content, % | ≤0.7 | ≤0.9 | ≤1.2 |
Ferric (Fe) content, % | ≤0.0035 | ≤0.006 | ≤0.01 |
Sulphates (SO4) content, % | ≤0.03 | --- | --- |
Water-insoluble matter content, % | ≤0.03 | ≤0.1 | ≤0.15 |
Melting point | 851 °C (1,564°F; 1,124 °K) in standard state (at 25 ℃[77 °F], 100 kPa) | 851 °C (1,564°F; 1,124 °K) in standard state (at 25 ℃[77 °F], 100 kPa) | 851 °C (1,564°F; 1,124 °K) in standard state (at 25 ℃[77 °F], 100 kPa) |
Boiling point | 1600℃ | 1600℃ | 1600℃ |
Density | 2.54g/cm3 (25 ℃) in standard state (at 25 ℃[77 °F], 100 kPa) | 2.54g/cm3 (25 ℃) in standard state (at 25 ℃[77 °F], 100 kPa) | 2.54g/cm3 (25 ℃) in standard state (at 25 ℃[77 °F], 100 kPa) |
Refractive index (nD) | 1.485 in standard state (at 25 ℃[77 °F], 100 kPa) | 1.485 in standard state (at 25 ℃[77 °F], 100 kPa) | 1.485 in standard state (at 25 ℃[77 °F], 100 kPa) |
Water solubility | Freely soluble in water | Freely soluble in water | Freely soluble in water |
Specific gravity | 2.532 | 2.532 | 2.532 |
pH | Aqueous solutions are strongly alkaline. At 25℃, the PH of 1, 5 and 10 wt% sodium carbonate solutions are 11.37, 11.58 and 11.70, respectively. | Aqueous solutions are strongly alkaline. At 25℃, the PH of 1, 5 and 10 wt% sodium carbonate solutions are 11.37, 11.58 and 11.70, respectively. | Aqueous solutions are strongly alkaline. At 25℃, the PH of 1, 5 and 10 wt% sodium carbonate solutions are 11.37, 11.58 and 11.70, respectively. |
Sensitivity | Hygroscopic | Hygroscopic | Hygroscopic |
Stability | Stable | Stable | Stable |
Storage | Dry, tight-closed, in a dry and cool place | Dry, tight-closed, in a dry and cool place | Dry, tight-closed, in a dry and cool place |
Shelf life/Retest | 24 months | 24 months | 24 months |
Appearance | White, odorless powder | White, odorless powder | White, odorless powder |