Name: L-3,6-Dimethyl-1,4-dioxane-2,5-dione

CAS No: 4511-42-6

Appearance: white particle

Purity: >99.5%

Minimal order quantity: 200 gram

L-Lactide is an important raw material of PLLA. The yield and purity of L-LA determine the quality and price of polylactide. L-lactide was synthesized mainly by decompression, including the synthesis of l-lactic acid oligomer, the depolymerization of l-lactic acid oligomer and the purification of L-la.

The initial lactide is about 80% pure, with a lot of yellow impurities. Then recrystallization, usually using ethanol or ethyl Acetate recrystallization for about 5 times, this time the purity can reach 99.5% . The environment and operation details of recrystallization are the most important factors. With regard to the purchase of Lactide, we advise customers to purchase directly for use, if not well preserved, subsequent use may also need to recrystallize, and most schools can not meet the environmental requirements of recrystallization.


L-Lactide is levorotatory, D-Lactide is dextrorotatory.

The actual l-lactide percent is related to the times of purification, solvents, operating environment, methods of purifications.

The theoretical l-lactide percent is about 80%. We use heat-stable lactic acid from Purac, the Lactic acid content is generally 80%-88%, when remove this part of water which forms in lactic acid condensation, oligomer pyrolysis to lactide and part of dimer trimer. The rough percent is 50%-60%. After recrystallization, the final percent is about 30-35%.

L-lactide is a solid at room temperature.

No, l lactide is not toxic.

The melting point of L-Lactide is approximately 96-99 degrees Celsius.

L-Lactide is a chemical compound that is commonly used in the production of biodegradable polymers, such as polylactic acid (PLA). 

L-Lactide is used as a monomer in the polymerization process to create these environmentally-friendly materials.

The solubility of L-Lactide is dependent on various factors such as temperature, solvent type, and concentration.

L-Lactide is slightly soluble in water and most organic solvents. However, its solubility increases with the increase in temperature and concentration. It is important to note that L-Lactide has a low solubility in non-polar solvents.

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