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Molecular formula: Na2S
Molecular weight: 78.04
CAS No.: 1313-82-2
H.S. code: 28301010
Standard: GB42009
Appearance: Sodium sulphide for tanning is thin flakes, yellow or red, soluble water, presenting strong alkaline solution, easily oxidized when exposed to air.
Usage: Sodium sulphide used in tannage, papermaking, textile, dye, chemical material, mining.
Packing:25kg plastic woven bags,or 1000kg jumbo bags.
Specification:
1. Sodium Sulphide Yellow Flake 60%
2. Sodium Sulphide 60% Min
3. Sodium Carbonate 2% Max
4. Sodium Sulfite 1% Max
Item | Index | |||||||
1500ppm | 150ppm | 80ppm | 50ppm | 30ppm | 20ppm | 15ppm | 10ppm | |
Na2S ≥% | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 60 |
Fe ≤% | 0.15 | 0.015 | 0.008 | 0.005 | 0.003 | 0.002 | 0.0015 | 0.001 |
Na2CO3 ≤% | 5.0 | 3.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
Watter insoluble ≤% | 0.4 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.1 | 0.05 |
Na2SO3 ≤% | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 1.5 | 1.0 |
Na2S2O3 ≤%
| 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 1.5 | 1.5 |