|
Appearance
|
White powder
|
|
Assay (alkalimetric)
|
Min 99%
|
|
Identity (IR)
|
Passes test
|
|
UV absorbance (at 250 nm; 5%; 1 cm; water)
|
Max 0.05
|
|
Chloride (Cl)
|
Max 0.005%
|
|
Sulphate (SO4)
|
Max 0.005%
|
|
Heavy metal (as Pb)
|
Max 0.0005%
|
|
Sodium (Na)
|
Max 0.01%
|
|
Loss on drying (at 105°C)
|
Max 0.5%
|
|
Biological buffer, pKa at 20°C
|
7.15
|