ویژگیهای فنی | |
---|---|
Assay (acidimetric, calc. on anhydrous substance) | 99.5 - 100.5 % |
Identity (IR-spectrum) | passes test |
Appearance | white to almost white or colorless crystals |
Appearance of solution (200 g/l; water) | clear (≤ 3 NTU) and not more intense in color than reference solution Y₇, BY₇ or GY₇ |
In water insoluble matter | ≤ 50 ppm |
Chloride (Cl) | ≤ 5 ppm |
Phosphate (PO₄) | ≤ 10 ppm |
Sulphate (SO₄) | ≤ 20 ppm |
Heavy metals (as Pb) | ≤ 5 ppm |
Al (Aluminium) | ≤ 0.2 ppm |
As (Arsenic) | ≤ 1 ppm |
Hg (Mercury) | ≤ 1 ppm |
Cu (Copper) | ≤ 5 ppm |
Fe (Iron) | ≤ 3 ppm |
Fe (Iron, acc. to Reag. Ph Eur.) | suitable to use in the limit test for iron |
Pb (Lead) | ≤ 0.5 ppm |
Oxalates (as C₂H₂O₄) | ≤ 50 ppm |
Readily carbonisable substance | passes test |
Sulfated ash | ≤ 200 ppm |
Water (according to Karl Fischer) | 7.5 - 8.8 % |
Corresponds to ACS, ISO 6353/2, Reag. Ph. Eur. |