POTASSIUM METABISULPHITE 95% EXTRAPURE
| Product Code | B-02138 | BRAND | Bio-Chem |
|---|---|---|---|
| Grade | EXTRAPURE | CAS No | 16731-55-8 |
| Molecular Formula | K2S2O5 | Molecular Weight | 222.31 |
| H.S.Code | 2832.20100 | Shelf Life | 60 Months |
| Purity | 95 % |
Physical Properties
| Physical state at 20 °C | Solid | Colour | White crystalline |
|---|---|---|---|
| Odour | Odorless | Density [g/cm3] | 2.34 |
| pH Value | 3-4.5 at 22.2 g/l at 25 °C | Solubility in water [% weight] | 22.2 g/l at 20 °C |
| Melting point/ Freezing point [°C] | 150 °C | Vapour density | 2.3 |
| Decomposition point [°C] | 150°C |
Packaging
Specification
| Appearance | White crystalline powder |
| Assay (iodometric) | 95 – 99.9% |
| Iodometric,SO2 | 54.8 – 57.6% |
| Appearance of solution | Passes test |
| pH (5% solution in water) | 3 – 4.5 |
| Chloride (Cl) | Max 0.05% |
| Heavy metal (as Pb) | Max 0.001% |
| Thiosulphate | Passes test |
| Copper (Cu) | Max 0.0025% |
| Zinc (Zn) | Max 0.0025% |
| Iron (Fe) | Max 0.002% |
| Selenium (Se) | Max 0.0005% |
| Arsenic (As) | Max 0.0002% |
| Mercury (Hg) | Max 0.0001% |
Safety Information and Hazard Symbols
Symbol: GHS02 , GHS07 , GHS09
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338