PARAMETER LIMIT

• Description A white crystalline powder or colourless crystals.
• Solubility 10% solution in water is clear and colourless.
• Identification Passes test.
• Minimum Assay (argentometric; after ignition) 99.9%
• pH (5% soln.) 5 – 8

MAXIMUM LIMIT OF IMPURITIES
– Loss on drying (at 105°C, for 2 hrs.) 0.5%
– Insoluble matter 0.003%
– Acidity or alkalinity Passes test.
– Ammonium (NH4) 0.0005%
– Bromide (Br) 0.005%
– Iodide (I) Passes test.
– Ferrocyanide [Fe(CN)6] Passes test.
– Nitrate (NO3) 0.0005%
– Nitrite (NO2) Passes test.
– Nitrogen compounds 0.001%
– Phosphate (PO4) 0.0005%
– Sulphate (SO4) 0.002%
– Arsenic (As) 0.0001%
– Barium (Ba) 0.001%
– Calcium (Ca) 0.002%
– Copper (Cu) 0.0002%
– Iron (Fe) 0.0002%
– Heavy metals (as Pb) 0.0005%
– Magnesium (Mg) 0.001%
– Potassium (K) 0.005%