阿斯巴甜 BR，99%
Aspartame
品牌：桔子
产品编号：S20364
CAS号：22839-47-0
分子式：C14H18N2O5
分子量：294.3
MDL：MFCD00002724
| 产品名称 : | 阿斯巴甜 |
|---|---|
| 英文名称 : | Aspartame |
| 参考名称 : | (S)-3-氨基-4-(((S)-1-甲氧基-1-氧代-3-苯基丙-2-基)氨基)-4-氧代丁酸 |
| 参考英文名称 : | (S)-3-Amino-4-(((S)-1-methoxy-1-oxo-3-phenylpropan-2-yl)amino)-4-oxobutanoic acid |
| CAS号 : | 22839-47-0 |
| 分子式 : | C14H18N2O5 |
| 分子量 : | 294.3 |
| SMILES : | COC(=O)[C@H](CC1=CC=CC=C1)NC(=O)[C@H](CC(=O)O)N |
| MDL NO : | MFCD00002724 |
| PubChem CID : | 134601 |
| InChIKey : | IAOZJIPTCAWIRG-QWRGUYRKSA-N |
| 储存条件 : | RT&&2-8℃ |
实验性质
| 外观 / 形态 : | CBI；Colorless or white odorless solid; [HSDB] White powder; [Alfa Aesar MSDS]；White, odourless, crystalline powder having a sweet taste. Approximately 200 times as sweet as sucrose |
|---|---|
| 颜色 / 形态 : | Colorless needles from water；White crystalline powder from water or alcohol |
| 熔点 : | 246.5 °C；Double MP: about 190 and 245 °C |
| 溶解性 : | >44.1 [ug/mL] (The mean of the results at pH 7.4)；More soluble in acidic solutions and hot water; slightly soluble in alcohol; very slightly soluble in chloroform; practically insoluble in oils.；Solubility in water in mg/mL at 25 °C: 18.2 at pH 3.72; 16.1 at pH 4.00, 15.2 at pH 4.05, 14.5 at pH 4.27, 13.8 at pH 4.78, 13.5 at pH 5.30, 13.7 at pH 5.70 and 14.2 at pH 6.00; in distilled water, 10.20 mg/mL at pH 7.00；In water, 1.0X10+4 mg/L at pH 3 and room temperature |
| 解离常数 pKa : | 3.19；7.87 |
| 热分解说明 : | When heated to decomposition it emits toxic fumes of /nitroxides/.；Photodecomposition of aspartame in aqueous solutions under different conditions of light intensity and pH were studied. The effects of photosensitizers (riboflavin and methylene blue) and ascorbic acid on aspartame stability in aqueous solutions at different pH under light were also studied. Light illumination significantly increased aspartame degradation in an aqueous solution (pH 7), indicating that aspartame was very unstable under the illuminated conditions. In the dark, 91% of aspartame in an aqueous solution at pH 7 remained after 10 h of storage. Under 5500 lux of light, however, 39% of aspartame in the solution was destroyed after 10 h of storage. Aspartame degradation under light followed simple zero-order reaction kinetics. The higher the light intensity, the greater the degradation of aspartame. The relative reaction rate for the destruction of aspartame under 0, 1100, 3300 and 5500 lux was 1:1.42:2.80:4.61. The photodecomposition rate of aspartame varied with the pH of the system. Aspartame degradation was fastest at pH 7.0, followed by pH 4.0 and pH 6.0, in decreasing order. Addition of 4.8 ppm riboflavin or 4.8 ppm methylene blue significantly accelerated the aspartame decomposition at pH 7 in the presence of light. There were, however, no significant photosensitizing effects of these sensitizers on aspartame destruction at pH 6 and pH 4. Addition of 1.2x10-4 increased the aspartame degradation at pH 7.0, but did not affect the destruction rate of aspartame at pH 6.0 and pH 4.0. |
| 气味 : | Odorless |
| pH : | 0.8% Solution in water has a pH of about 5.3.；Between 4,5 and 6,0 (1 in 125 solution) |
| LogP : | -0.1 |
| 旋光性 : | [α]D/20: + 14,5° to + 16,5°; Determine in a 4 in 100/15 N formic acid solution within 30 minutes after preparation of the sample solution；Specific optical rotation: -2.3 deg at 22 °C/D (1 N HCl) |
计算性质
| LogP : | -2.7 |
|---|---|
| 极性表面积 (TPSA) : | 119 Ų |
| 氢键供体数 : | 3 |
| 氢键受体数 : | 6 |
| 可旋转键数 : | 8 |
| 精确质量 : | 294.12157168 Da |
| 重原子数 : | 21 |
| 分子复杂度 : | 380 |
资料来源：阿斯巴甜产品资料页；来源页标注 PubChem CID 134601，资料日期 2026-10-11。
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