Urea
| Specifications (USP 39) | Tests | Row |
| According to USP 39 | Identification | 1 |
| 132 – 135 | Melting range | 2 |
| NMT 0.1% | Residue on ignition | 3 |
| NMT 0.04% | Alcohol-insoluble matter | 4 |
| NMT 0.007% | Chloride | 5 |
| NMT 0.01% | Sulfate | 6 |
| NMT 20 ppm | Heavy metals | 7 |
| 99.0- 100.5% | Assay | 8 |
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