Essential details
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Product Introduction
1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | 1-(4-tert-butylphenyl)-3-(4-methoxyphenyl)propane-1,3-dione (also: 4-tert-butyl-4'-methoxydibenzoylmethane) |
| Common Name(s) | Avobenzone; Parsol 1789; Eusolex 9020; Escalol 517; Neo Heliopan 357; Butyl Methoxydibenzoylmethane (BMDBM) |
| CAS Registry Number | 70356-09-1 |
| EC/EINECS Number | 274-576-0 |
| Molecular Formula | C₂₀H₂₂O₃ |
| Molecular Weight | 310.39 g/mol |
| Chemical Class | Dibenzoylmethane derivative; oil-soluble organic UVA filter; sunscreen agent; photoprotective ingredient |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | β-diketone system (enol-keto tautomerism); tert-butyl group; methoxy group; two benzoyl groups |
| Physical Appearance | State & Color | Pale yellow crystalline powder; slight characteristic odor |
| Melting Point | 81-84 °C (lit.) | |
| Boiling Point | Decomposes before boiling (decomposes >150 °C) | |
| Density (25 °C) | 1.10 g/cm³ (crystalline form) | |
| Solubility | Oil Solubility | Soluble in ethanol, isopropanol, acetone, ethyl acetate, and cosmetic oils (100+ g/100 mL) |
