| 1 | Appearance | White crystalline powder. | White crystalline powder. | USP/ Ph. Eur |
| 2 | Solubility | Complies | Soluble in water, practically insoluble in ethanol (96%) | Ph. Eur |
| 3 | Identification (By IR) | Complies | IR spectra of the sample should be concomitant with IR spectra of standard | USP/ Ph. Eur |
| 4 | Identification (By chemical test) | Complies | No precipitate should produce. | Ph. Eur |
| 5 | Appearance of Solution | Complies | Solution should be clear and colorless. | Ph. Eur |
| 6 | pH | 5.1 | 4.0-5.5 | USP/ Ph. Eur |
| 7 | Impurity A (Nitrilotriacetic acid) | 0.03% | 0.1% max | USP / Ph. Eur |
| 8 | Calcium (Ca) | Complies | No precipitate should form. | USP |
| 9 | Iron (Fe) | Less than 80 ppm | 80ppm max | Ph. Eur |
| 10 | Assay (on dried basis) | 99.8% | 99.0% - 101.0% | USP |
| 11 | Loss on drying at 150° for 6 Hr | 9.1% | 8.7%-11.4% | USP |
| 12 | Particle size | 98% Passes through 100 mesh. | NLT 95% Passes through 100 mesh | |