Specifications :

• Assay (alkalimetric) : 99.5 – 100.5 %
• Identity : passes test
• Appearance of solution : passes test
• pH-value (3.3 %, water) : 3.8 – 4.8
• Chloride (Cl) : ≤ 0.0003 %
• Phosphate (PO₄) : ≤ 0.0005 %
• Sulfate (SO₄) : ≤ 0.0005 %
• Solubility in ethanol : passes test