Physical Properties
| Physical state at 20 °C | Solid | Odour | Odorless |
| Melting point/ Freezing point [°C] | 179 °C | Solubility in water [% weight] |
Insoluble in water
|
| Colour | Dark red powder | Density [g/cm3] | 9.3 |
Packings
100g
25g
Safety Information and Hazard Symbols
Safety Statement: 22-24/25
Specifications
| Appearance | Dark red to maroon to violet or purple powder or crystals |
| Identity | Passes test |
| pH transition range (4.4 – 6.2) | Pink Red – yellow orange |
| Insoluble matter in ethanol (1 g/L) | Passes test |
| Absorption maxima (buffer pH 4.5) | 523 – 526 nm |
| Absorption maxima (buffer pH 6.2) | 427 – 437 nm |
| Loss on drying (at 110°C) | Max 5.0% |
| Residue on ignition (as SO4) | Max 2.0% |
- توجه :