| 1 | Description | Colourless, translucent crystals;Efflorescent in warm, in dry air. | Colourless, translucent crystals; white or almost white granular to fine crystalline powder. Efflorescent in warm, in dry air. |
| 2 | Solubility | Complies | Very soluble in water, freely soluble in alcohol, very slightly soluble in ether |
| 3 | Identification by Chemical test | Complies | The solution is strongly acidic |
| 4 | Identification (By IR) | Complies | IR spectra of the sample should be concomitant with IR spectra of the corresponding standard |
| 5 | Identification (By Water) | 8.6% | 7.5% to 9.0% |
| 6 | Identification | Complies | Yields the reactions characteristic of citrates. |
| 7 | Appearance of solution | Complies | The solution is clear and colourless or not more intensely coloured than reference solution YS7, BYS7 or GYS7 |
| 8 | Clarity of solution | Complies | The sample solution shows the same clarity as that of water or its opalescence is not more pronounced that standard suspension A |
| 9 | Colour of solution | Complies | The sample solution is not more intensely colored than water or standard solutions A, B, and C. |
| 10 | Assay (Anhydrous basis) | 99.8% | 99.5% - 100.5% |
| 11 | Residue on ignition | 0.04% | NMT 0.1% |
| 12 | Sulfate | Less than 150ppm | NMT 150ppm |
| 13 | Limit of oxalic acid | Less than 360ppm | NMT 360ppm |
| 14 | Readily carbonizable substances | Complies | The color of the acid is not darker than that of a similar volume of reference solution. |
| 15 | Chloride (Cl) | Less than 0.0005% | NMT 0.0005% |
| 16 | Oxalate | Complies | No turbidity should appear. |
| 17 | Calcium | 7ppm | NMT 200ppm |
| 18 | Iron | 0.0003% | NMT 0.001% |
| 19 | Arsenic | Less than 0.0001% | NMT 0.0001% |
| 20 | Barium | Complies | Any opalescence produced should not more intense than that of mixture of 5ml of solution A and 5ml of distilled water |
| 21 | Water | 8.6% | 7.5% to 9.0% |
| 22 | Sulphated ash | 0.04% | NMT 0.1% |
| 23 | Oxalic acid | Complies | Any pink colour produced is not more intense than that produced by carrying out the test using 0.2mg of oxalic acid dissolved in 4ml of water. |