Essential details
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Product Introduction
| Parameter Category | Parameter Name | English Value/Specification |
|---|---|---|
| Basic Identification | Chemical Name | Benzophenone-3; 2-Hydroxy-4-methoxybenzophenone; Oxybenzone |
| Abbreviation | BP3; UV-9 | |
| CAS Number | 131-57-7 | |
| EINECS Number | 205-031-5 | |
| Molecular Formula | C₁₄H₁₂O₃ | |
| Molecular Weight | 228.24 g/mol | |
| Chemical Class | Benzophenone-derived UV absorber/light stabilizer | |
| Physicochemical Properties | Appearance | White to pale yellow crystalline powder |
| Melting Point | 62–64 °C (literature value) | |
| Boiling Point | 150–160 °C (at 5 mmHg pressure) | |
| Density (20 °C) | 1.3 g/cm³ | |
| Flash Point (Closed Cup) | 216 °C | |
| Water Solubility (20 °C) | <0.1 g/100 mL (practically insoluble) | |
| Organic Solvent Solubility | Soluble in ethanol (50 mg/mL), acetone, ethyl acetate, and chloroform; insoluble in hexane | |
| LogP (Partition Coefficient) | 3.45 (at 40 °C) | |
| UV Absorption Properties | Max Absorption Wavelength (λmax) | 288 nm (UVB range) |
| Effective Absorption Range | 280–340 nm (covers UVB and short UVA) | |
| Molar Extinction Coefficient | ~1.6×10⁴ L·mol⁻¹·cm⁻¹ (in ethanol at λmax=288 nm) | |
| Quality Specifications | Purity (HPLC) | ≥97.0% (industrial grade); ≥99.0% (cosmetic grade) |
| Loss on Drying | ≤0.2% (at 105 °C for 2 hours) | |
| Ash Content | ≤0.1% |
