|
Appearance
|
White deliquescent pellets or pearls
|
|
Assay (acidimetric)
|
98 - 100.5%
|
|
Identity (acc. to pharmacopoeias)
|
Passes test
|
|
Appearance of solution
|
Passes test
|
|
Insoluble matter in water
|
Max 0.025%
|
|
Sodium carbonate (Na2CO3)
|
Max 1.0%
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.003%
|
|
Phosphate (PO4)
|
Max 0.001%
|
|
Silicate (SiO2)
|
Max 0.001%
|
|
Total nitrogen (N)
|
Max 0.0003%
|
|
Heavy metal (as Pb)
|
Max 0.002%
|
|
Iron (Fe)
|
Max 0.001%
|
|
Nickel (Ni)
|
Max 0.001%
|
|
Calcium (Ca)
|
Max 0.005%
|
|
Potassium (K)
|
Max 0.05%
|
|
Magnesium (Mg)
|
Max 0.002%
|
|
Mercury (Hg)
|
Max 0.00001%
|