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 the levorotatory form of lactide, which is a cyclic diester derived from the condensation of two molecules of lactic acid. The “L” in L-lactide refers to the specific optical isomerism of the molecule, which is based on the spatial arrangement of atoms around the chiral center. L-lactide is the enantiomer that rotates plane-polarized light to the left, which is a characteristic of levorotatory compounds.

In polymer chemistry, L-lactide can be polymerized to form poly-L-lactic acid (PLLA), which is a stereospecific form of polylactic acid (PLA). PLLA is a biodegradable and biocompatible polymer that is widely used in medical applications such as sutures, implants, and as a material for bioresorbable medical devices. It is also used in packaging and as a fiber for textiles.

PLLA derived from L-lactide has distinct properties such as high strength and stiffness, and it degrades in the body into lactic acid, which is a naturally occurring substance that can be metabolized by the body. The rate of degradation and the mechanical properties of PLLA can be controlled by the molecular weight of the polymer and the processing conditions.


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.

Yes, L-lactide is a monomer. It is a cyclic ester that can polymerize to form polylactic acid (PLA), which is commonly used in various industries such as biodegradable plastics, medical implants, and tissue engineering.

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