21210
synthetic
200
≥98.0%
powder or crystals
[α]20/D +27±2°, c = 5% in H2O
≤0.002% heavy metals
≤3% loss on drying
white
6.8-7.2 (25 °C, 50 mg/mL in H2O)
H2O: 50 mg/mL at 25 °C, clear, almost colorless