| Description |
White or almost white, granular powder or transparent crystals; odourless; hygroscopic |
| Solubility |
Very soluble in water, practically insoluble in alcohol |
| Appearance of solution |
10% aqueous solution is clear and colourless |
| Acidity or Alkalinity |
Passes as per Pharmacopoeia |
| Sodium |
Not more than 0.3 % w/w |
| Chlorides |
Passes as per Pharmacopoeia |
| Sulphates |
Passes as per Pharmacopoeia |
| Heavy metals |
Passes as per Pharmacopoeia |
| Arsenic |
Passes as per Pharmacopoeia |
| Oxalates |
Passes as per Pharmacopoeia |
| Readily carbonisable substances |
Passes as per Pharmacopoeia |
| Tartrate |
Passes as per Pharmacopoeia |
| Loss on drying / Water |
Between 4.0 and 6.0 % w/w |
| Assay |
Between 99.0 and 100.5 % w/w |