Specifications :

• Assay (alkalimetric, calculated on dried substance) : ≥ 99 %
• Identity (IR-spectrum) : conforms
• pH (100 g/l, water) : 5.5 – 7.5
• UV-transmission (0.005 mol/l; 1 cm; Water) (at 200 nm) : ≥ 70 %
• UV-transmission (0.005 mol/l; 1 cm; Water) (at 220 nm) : ≥ 90 %
• UV-transmission (0.005 mol/l; 1 cm; Water) (at 250 nm) : ≥ 98 %
• Loss on drying (120 °C; 4h; Vacuum) : ≤ 2.0 %