L-lactide (3,6-dimethyl-1,4-dioxane-2,5-dione) is a cyclic lactone derived from lactic acid, with the molecular formula C3H6O2. It serves as a crucial building block for the synthesis of polylactic acid (PLA) plastics, which are extensively used in various manufacturing applications.
L-Lactide Chemical Properties
| Melting point | 92-94 °C(lit.) |
| Boiling point | 255°C |
| Density | 1.186±0.06 g/cm3(Predicted) |
| Vapor pressure | 0.311Pa at 25℃ |
| Refractive index | 1.4475 |
| Storage temp | 2-8°C |
| Solubility | Soluble in chloroform, and methanol. Slightly soluble in benzene. |
| Form | Solid |
| Color | White to Off-White |
| Optical Rotation | [α]20/D 285°, c = 1 in toluene |
| Water Solubility | 16.7g/L at 20℃ |
| Sensitive | Moisture Sensitive |
| BRN | 82124 |
| Stability | Hygroscopic |
| InChIKey | JJTUDXZGHPGLLC-IMJSIDKUSA-N |
| LogP | 0.4 at 25℃ |
| CAS DataBase Reference | 4511-42-6(CAS DataBase Reference) |
| EPA Substance Registry System | 1,4-Dioxane-2,5-dione, 3,6-dimethyl-, (3S,6S)- (4511-42-6) |
Safety Information
| Hazard Codes | Xi |
| Risk Statements | 36/37/38-36 |
| Safety Statements | 26-37/39 |
| WGK Germany | 3 |
| TSCA | Yes |
| HS Code | 29322090 |
L-Lactide is a monomer used in the production of polylactic acid (PLA), a biodegradable thermoplastic with numerous applications in the pharmaceutical industry. It can also be used to modify existing drug carriers or to develop new ones from scratch, making L-Lactide a highly versatile and essential material for pharmaceutical applications.
