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1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | 3,3,5-Trimethylcyclohexyl 2-hydroxybenzoate |
| Common Name(s) | Homosalate; Homomenthyl Salicylate (INCI name); Heliopan; Filtrosol A; Eusolex HMS |
| CAS Registry Number | 118-56-9 |
| EC/EINECS Number | 204-260-8Directorate-General for Health and Food Safety |
| Molecular Formula | C₁₆H₂₂O₃ |
| Molecular Weight | 262.34 g/mol |
| Chemical Class | Salicylic acid ester; oil-soluble organic UVB filter; sunscreen agent; solvent/stabilizer for other UV filters |
| Related Compound | Octyl Salicylate (Ethylhexyl Salicylate, CAS 118-60-5) - differs by ester group (homomenthyl/3,3,5-trimethylcyclohexyl vs 2-ethylhexyl) |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | Hydroxyl group (-OH); ester linkage (-COO-); benzene ring; 3,3,5-trimethylcyclohexyl side chain |
| Physical Appearance | State & Color | Clear, colorless to pale yellow oily liquid; slight characteristic odor |
| Melting Point | -15 to -10 °C (liquid at room temperature) | |
| Boiling Point | 180-185 °C at 5 mmHg (decomposes at atmospheric pressure) | |
| Density (25 °C) | 1.03-1.04 g/cm³ |
