Physical state at 20 °C | Solid | Colour | White crystalline |
Solubility in water [% weight] | Slightly soluble in water |
Appearance | White crystalline powder |
Assay (acidimetric; on dried basis) | Min 99% |
Identity (IR) | Conforms |
pH (10% solution) | 5.5 – 7.5 |
UV transmittance (0.005 mol/L; 1cm; water) | |
at 200 nm | Min 70% |
at 220 nm | Min 90% |
at 250 nm | Min 98% |
Loss on drying (at 120°C; vacuum) | Max 2% |