| Parameter |
Specification |
| Appearance |
White crystalline powder |
| Assay % w/w |
99.0 - 100.5 % (Dry Basis) |
| Acidity or Alkalinity |
To pass test |
| Water (Karl Fischer) |
4.0-6.0% |
| Loss on drying |
4.0-6.0% (monohydrate) |
| pH value (5% solution) |
7.5-9.0 |
| Lead |
0.5 mg/kg max |
| Tartrate |
To pass test |
| Heavy metals (as lead) |
5 mg/kg max |
| Chloride |
15 mg/kg max |
| Sulphate |
100 mg/kg max |
| Oxalic acid/ oxalate |
100 mg/kg max |
| Residual solvents |
No solvents used |
| Appearance of solution |
To pass test |
| Readily carbonisable substances |
To pass test |
| Sodium |
0.3% max |
| Potassium |
35.6-36.2% |
| Mercury |
0.5 mg/kg max |
|
Arsenic/td>
| 1 mg/kg max |
| Microbials |
Tested on a random basis |
| Total plate count |
100 cfu/1g max |
| Yeast and molds |
20 cfu/1g max |
| Escherichia coli (typical) |
Negative/25g |
| Entereobacteriaceae (typical) |
Negative/25g |
| Salmonella (typical) |
Negative/25g |
| Staphylococcus aureus (typical) |
Negative/25g |