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1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | 2-Propenoic acid, 2-cyano-3,3-diphenyl-, ethyl ester (also: Ethyl 2-cyano-3,3-diphenylprop-2-enoate) |
| Common Name(s) | Etocrylene; Ethyl α-cyano-β,β-diphenylacrylate; Uvinul N 35; UV Absorber 2; CE 2; TinSorb™ ETO |
| CAS Registry Number | 5232-99-5 |
| EC/EINECS Number | 226-029-3 |
| Molecular Formula | C₁₈H₁₅NO₂ |
| Molecular Weight | 277.32 g/mol |
| Chemical Class | Cyanoacrylate derivative; organic UV filter; light stabilizer; sunscreen agent |
| Related Compound | Octocrylene (2-ethylhexyl 2-cyano-3,3-diphenylacrylate, CAS 6197-30-4) - differs by ester group (ethyl vs 2-ethylhexyl) |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | Cyano group (-CN); ester linkage (-COO-); diphenyl substitution on propenoic acid backbone |
| Physical Appearance | State & Color | White to pale yellow crystalline powder; odorless or very faint characteristic odor |
| Melting Point | 98-102 °C (solid at room temperature) | |
| Boiling Point | Decomposes before boiling (decomposes >200 °C) | |
| Density (25 °C) | 1.14-1.20 g/cm³ (crystalline form) | |
| Solubility | Oil Solubility | Soluble in ethanol, isopropanol, acetone, ethyl acetate, and cosmetic oils (100+ g/100 mL) |
