Необходимые детали
Доставка:快递, 空运, 陆运, 海运
Введение в продукт
1. Basic Identification Information
| Parameter | English Specification/Value |
|---|---|
| IUPAC Name | Methyl 4-hydroxybenzoate |
| Common Name(s) | Methyl Paraben; Nipagin M; Methyl Parasept; Solbrol M; E218 (EU food additive code) |
| CAS Registry Number | 99-76-3 |
| EC/EINECS Number | 202-785-7 |
| Molecular Formula | C₈H₈O₃ |
| Molecular Weight | 152.15 g/mol |
| Chemical Class | Paraben (ester of p-hydroxybenzoic acid and methanol); broad-spectrum antimicrobial preservative |
2. Physicochemical Properties
| Property Category | Specific Parameter | Specification/Value |
|---|---|---|
| Structural Features | Functional Groups | Phenolic hydroxyl (-OH); ester group (-COOCH₃); aromatic benzene ring |
| Physical Appearance | State & Color | White crystalline powder; odorless or faint phenolic odor |
| Melting Point | 125–128 °C | |
| Boiling Point | 270–272 °C (decomposes slightly above boiling point) | |
| Density (25 °C) | 1.27 g/cm³ (crystalline form) | |
| Solubility | Polar Solvents | Soluble in ethanol (1 g/3 mL), propylene glycol (1 g/4 mL); moderately soluble in water (0.25 g/100 mL at 25 °C, increases in alkaline systems) |
