Physical state at 20 °C | Solid | Odour | Odorless |
Melting point/ Freezing point [°C] | 214 °C | Solubility in water [% weight] | Partially soluble in water |
Colour | White crystalline | Density [g/cm3] | 1.525 |
2.2 – 2.6 | Vapour density | 9.06 | |
Boiling point [°C] | 2.230 °C |
Appearance | White or almost white crystalline powder |
Specific optical rotation ([α]20/D; 10% in water; on dried substance) | +54.4 to +55.9° |
Water (H2O) | 4.8 – 5.4% |
Free acid | Max 0.25 ml N% |
Insoluble matter | Max 0.005% |
Alcohol soluble impurities | Max 0.2% |
Sulphated ash | Max 0.3% |
Nitrogen compounds (as N) | Max 0.02% |
Arsenic (As) | Max 0.0001% |
Copper (Cu) | Max 0.00005% |
Iron (Fe) | Max 0.0002% |
Lead (Pb) | Max 0.00005% |