| Article No. | 05394 |
| Purity | 95% |
| Molecular Formula | K2S2O5 |
| H.S. Code | 2832.2010 |
| Grade | Extra Pure |
| CAS No. | 16731-55-8 |
| Molecular Weight | 222.31 |
| Shelf Life | 60 Months |
Symbol:
| 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 | ||||||
| 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% |
 |
Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338
EN 