| CAS No.: | 16731-55-8 |
|---|---|
| Formula: | K2o5s2 |
| EINECS: | 240-795-3 |
| Purity: | ≥99% |
| Type: | Sodium Sulfate |
| Appearance: | Powder |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier POTASSIUM METABISULFITE for food bleaching agent cas 16731-55-8
| POTASSIUM METABISULFITE Basic information | |
| Product Name: | POTASSIUM METABISULFITE |
| CAS: | 16731-55-8 |
| MF: | K2O5S2 |
| MW: | 222.32 |
| EINECS: | 240-795-3 |
| POTASSIUM METABISULFITE Chemical Properties | |
| Melting point | 190°C |
| density | 2.34 g/cm3 |
| vapor density | 2.3 (vs air) |
| storage temp. | Store at +5°C to +30°C. |
| solubility | H2O: 0.1 M at 20 °C, clear, colorless |
| form | Powder/Solid |
| Specific Gravity | 2.3 |
| color | White to slightly yellow |
| Odor | Odorless |
| PH | 2.5-4.5 (25ºC, 0.1M in H2O) |
| PH Range | 3-4.5 at 22.2 g/l at 25 °C |
| Water Solubility | Soluble in water. Insoluble in ethanol. |
| λmax | 267nm(H2O)(lit.) |
| Sensitive | Air Sensitive |
| Decomposition | 150°C |
| Merck | 147,645 |
| EPA Substance Registry System | Disulfurous acid, potassium salt (1:2) (16731-55-8) |
| Test item | Unit | Specification |
| K2S2O5 | g/100g | ≥97.2 |
| SO2 | g/100g | ≥56.0 |
| K2S2O3 | g/100g | 0.1Max |
| Na | g/100g | 2Max |
| Cl | g/kg | 0.5Max |
| pH-value(10%solution) | - | 3.8-4.8 |
| heavy metal(measured by Pb) | mg/kg | 10Max |
| As | mg/kg | 1Max |
| Cu | mg/kg | 1 Max |
| Fe | mg/kg | 5Max |
| Hg | mg/kg | 0.1 Max |
| Pb | mg/kg | 1 Max |
| Se | mg/kg | 1 Max |
| Zn | mg/kg | 1 Max |
Suppliers with verified business licenses
Audited Supplier 
){kind=link}
){kind=link}