Physical Properties
| Physical state at 20 °C | Solid | Odour | Odorless |
| Melting point/ Freezing point [°C] | 149 °C | Solubility in water [% weight] | 263.1 g/l at 20 °C |
| Colour | White crystalline | pH value | 4.5 – 5.5 at 263.1 g/l at 25 °C |
Packings
100g
Revision Date : 28-Apr-2016
Specifications
| Appearance | White crystalline powder |
| Assay (as C6H6Na2O7.1½ H2O) | 98.0 – 104.0% |
| Solubility | Freely soluble in water & practically Insoluble in methanol |
| Identification | To comply BP |
| pH (3% w/v solution in water) | 4.9 to 5.2 |
| Arsenic (As) | Max. 0.0002% |
| Heavy metal | Max. 0.002% |
| Chloride (Cl) | Max. 0.033% |
| Oxalate (as C2H2O4) | Max. 0.015% |
| Sulphate (SO4) | Max. 0.12% |
| Readily carbonisable substance | Passes test |
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