Physical state at 20 °C | Solid | Odour | Odorless |
pH value | 8-9.5 | Solubility in water [% weight] | Soluble in water |
Colour | Brownish red powder |
Appearance | Brownish red powder |
Appearance of solution (1.0 g/L; water) Sensitivity test Passes test | almost clear to slightly turbid , red solution |
Transition range at pH 3.0 to pH 5.2 | Violet to orange red |
Loss on drying (at 110°C) | Max 5.0% |