CAS number： 97-59-6
Molecular formula： C4H6N4O3
molecular weight： 158.1154
Chemical structure：
Certificate of Analysis
| Product Name | Allantoin | |
| Expiring Date | 3 years | |
| Inspection Standard | USP34 | |
| Item | Specification | Result |
| Assay | 98.5-101.0% | 99.2% |
| Characteristic | White crystalline powder | Conform |
| Melting Point | 225°C, with decomposition | 228°C |
| Solubility | Slightly soluble in water Very slightly soluble in alcohol | Conform |
| Identification | A. Infrared spectrum is march
with the spectrum of CRS B. Thin-Layer Chromatographic Identification Test TEST C | Conform |
| Acidity or alkalinity | To conform | Conform |
| Optical rotation | -0.10º~+0.10º | Conform |
| Related substances | <0.5% | 0.3% |
| Loss on drying | <0.1% | 0.05% |
| Sulphated Ash | <0.05% | 0.03% |
| Heavy Metal (Pb) | ≤10ppm | 3 ppm |
| Reducing substances | To 1.0 g of Allantoin add 10 mL of water, shake for 2 minutes, and filter.Add 1.5 mL of 0.02 M potassium permanganate: the solution remains violet for at least 10 minutes. | Conform |
| PH | 4.5-6 | 5.2 |
