|
Appearance
|
White crystalline powder/crystals
|
|
Assay (complexometric)
|
99.0-100.5%
|
|
Identification
|
To comply USP, BP test
|
|
Appearance of solution
|
Passes test
|
|
Insoluble matter
|
Max 0.005%
|
|
pH (10% solution in water)
|
3.0 -.3.5
|
|
Chloride (Cl)
|
Max 0.0005%
|
|
Ammonium (NH4)
|
Max 0.005%
|
|
Arsenic (As)
|
Max 0.0002%
|
|
Copper (Cu)
|
Max 0.0005%
|
|
Iron (Fe)
|
Max 0.0005%
|
|
Heavy metal (as Pb)
|
Max 0.001%
|
|
Sodium (Na)
|
Max 0.02%
|
|
Loss on drying (at 400°C)
|
43 - 46%
|