膽鹼
膽鹼（粵拼：daam2 gaan2，Choline），係種營養素，化學式C5H14NO+。
| 膽鹼 | |
|---|---|
| |
| |
| 別名 | 2-Hydroxy-N,N,N-trimethylethanaminium Bilineurine (2-Hydroxyethyl)trimethylammonium |
| 識別 | |
| CAS號 | 62-49-7（choline hydroxide） |
| PubChem | 305 |
| ChemSpider | 299 
|
| SMILES | C[N+](C)(C)CCO
|
| ChEBI | 15354 |
| DrugBank | DB00122 |
| KEGG | C00114 |
| 性質 | |
| 化學式 | C5H14NO+ |
| 摩爾質量 | 104.17 g/mol g·mol−1 |
| 外觀 | viscous deliquescent liquid (choline hydroxide) |
| 溶解度（水） | very soluble (choline hydroxide) |
| 溶解度 | soluble in ethanol, insoluble in diethylether and chloroform (choline hydroxide) |
| 危險性 | |
| GHS危險性符號 Template:GHS05 | |
| LD50 | 3–6 g/kg bw, rats, oral |
| 如果無講明，所有數據都係指25 °C，100 kPa嘅時候嘅情況。 | |
 |