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POTASSIUM METABISULPHITE Extra Pure
| Article No. | Grade | Purity | CAS No. | Molecular Formula | Molecular Weight | H.S. Code | Shelf Life |
|---|---|---|---|---|---|---|---|
| SC1749 | Extra Pure | 95% | 16731-55-8 | K2S2O5 | 222.31 | 2832.2010 | 60 Months |
Packings
| 500 g,5000 g,25 Kg,50 Kg |
Physical Properties
| Physical state at 20 °C | Solid |
| Colour | White crystalline |
| Odour | Odorless |
| pH value | 3-4.5 at 22.2 g/l at 25 °C |
| Melting point/ Freezing point [°C] | 150°C |
| Decomposition point [°C] | 150°C |
| Vapour density | 2.3 |
| Density [g/cm3] | 2.34 |
| Solubility in water [% weight] | 22.2 g/l at 20 °C |
Specifications
| 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 | GHS07 |
| Signal Word | Warning |
| UN No. | |
| IMCO Class No. | |
| Packing Group | |
| Hazardous Statement | H315-H319-H335 |
| Precaution Statement | P261-P305 + P351 + P338 |
| Risk Statement | |
| Safety Statement | |
Revision Date : 13-Dec-2013
Certificate of Analysis (COA's)
To download COA please enter the batch number below