|
Appearance
|
White granules
|
|
Assay (Titration after Ion exchange)
|
Min 99.0
|
|
Insoluble matter
|
Max 0.01%
|
|
Loss on ignition
|
Max 0.5%
|
|
pH (5% solution in water; 25°C)
|
5.2 - 9.2
|
|
Chloride (Cl)
|
Max 0.001 %
|
|
Phosphate (PO4)
|
Max 0.001 %
|
|
Calcium (Ca)
|
Max 0.01%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Magnesium (Mg)
|
Max 0.005%
|
|
Potassium (K)
|
Max 0.01%
|
|
Heavy metals (by ICP-OES)
|
Max 0.0005%
|
|
Nitrogen compounds (as N)
|
Max 0.0005%
|
|
Extraction-concentration suitability (dried at 400°C for 1hr)
|
Passes test
|
|
Mesh size
|
|
|
Retained sieves US Standard No.10
|
Max 1.0%
|
|
Retained sieves US Standard No.60
|
Min 90.0%
|
|
Through sieve US Standard No. 60
|
Max 10.0%
|
|
Through sieve US Standard No. 100
|
Max 5.0%
|