CAS number： 99-76-3
Molecular formula： C8H8O3
molecular weight： 151.1399
Chemical structure：
Certificate of Analysis
| Product Name | Methyl Paraben | |
| Expiry Date | 2 years | |
| Inspection Standard | USP29 | |
| Item | Specification | Result |
| Appearance | White crystalline powder | Comply |
| Purity(on dry base)% | 99.0-100.5 | 99.3 |
| Melting point | 125-128 | 126.4 |
| Acid | Passed | Passed |
| Identification | A. Infrared absorption Spectrophotometry B. Thin-Layer Chromatographic | Passed |
| Residue % | ≤ 0.1 | 0.030 |
| Loss on drying % | ≤0.50 | 0.35 |
| Heavy metal (Pb) | ≤10ppm | 3ppm |
| Organic Volatile Impuritie | Passed | Passed |
| Related Substances | Passed | Passed |
| Appearance of solution | Clear | Passed |
