Essential details
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Product Introduction
1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | 2-Ethylhexyl 2-hydroxybenzoate (also: Octyl 2-hydroxybenzoate) |
| Common Name(s) | Octyl Salicylate; Ethylhexyl Salicylate (INCI name); Octisalate; Eusolex OS; Neo Heliopan OS; Sunarome O |
| CAS Registry Number | 118-60-5 (2-ethylhexyl ester); 6969-49-9 (n-octyl ester) - cosmetic grade is primarily 118-60-5 |
| EC/EINECS Number | 204-263-4 |
| Molecular Formula | C₁₅H₂₂O₃ |
| Molecular Weight | 250.33 g/mol |
| Chemical Class | Salicylic acid ester; oil-soluble organic UVB filter; sunscreen agent; photostabilizer |
| Related Compound | Homosalate (Homomenthyl salicylate, CAS 118-56-9) - differs by ester group (homomenthyl vs 2-ethylhexyl) |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | Hydroxyl group (-OH); ester linkage (-COO-); benzene ring; 2-ethylhexyl side chain |
| Physical Appearance | State & Color | Colorless to pale yellow clear oily liquid; slight floral odor |
| Melting Point | -10 to -8 °C (liquid at room temperature) | |
| Boiling Point | 170-175 °C at 5 mmHg (decomposes at atmospheric pressure) | |
| Density (25 °C) | 1.01-1.02 g/cm³ | |
| Solubility | Oil Solubility | Soluble in ethanol, isopropanol, acetone, ethyl acetate, and cosmetic oils (100+ g/100 mL) |
