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HomeProduct name listDL-Lactide

DL-Lactide

Synonym(s):Lactide

  • CAS NO.:95-96-5
  • Empirical Formula: C6H8O4
  • Molecular Weight: 144.13
  • MDL number: MFCD00011685
  • EINECS: 202-468-3
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-10-24 21:11:45
DL-Lactide Structural

What is DL-Lactide?

Chemical properties

White crystalline powder

The Uses of DL-Lactide

DL-Lactide is used to produce 2-hydroxy-propionic acid 1-(1-phenyl-ethoxycarbonyl)-ethyl ester. It acts as an important raw material and an intermediate used in organic synthesis, pharmaceuticals, agrochemicals and dyes. It is involved in enzymatic alcoholysis to produce both alkyl (R)-lactates and alkyl (S,S)-lactyllactates.

The Uses of DL-Lactide

Enzymatic alcoholysis of this racemic lactide catalyzed by commercial Novozym® 435 produces both alkyl (R)-lactates and alkyl (S,S)-lactyllactates in good yield and high enantiopurity.

Definition

ChEBI: Lactide is a member of dioxanes.

General Description

3,6-Dimethyl-1,4-dioxane-2,5-dione (or rac-lactide), is the 50:50 racemic mixture of D- and L-Lactide. Rac-lactide is a lactone derived from lactic acid that has attracted great interest in academia and commercial applications, as it is derived from abundant renewable resources. Rac-lactide can be ready polymerized via ring-opening polymerization, using a variety of metal or organocatalysts, yielding poly(D,L-lactide). While the resulting polymer is generally amorphous, the use of stereospecific catalysts can lead to heterotactic PLA, which exhibits some degree of crystallinity.

Flammability and Explosibility

Non flammable

Properties of DL-Lactide

Melting point: 116-119 °C
Boiling point: 142 °C8 mm Hg(lit.)
Density  1.186±0.06 g/cm3(Predicted)
vapor pressure  0.311Pa at 25℃
Flash point: 180°C
storage temp.  2-8°C
solubility  Soluble in chloroform and methanol. Slightly soluble in benzene.
form  Crystalline Powder
color  White
Water Solubility  16.3g/L at 20℃
Sensitive  Moisture Sensitive
BRN  82121
NIST Chemistry Reference 1,4-Dioxane-2,5-dione, 3,6-dimethyl-(95-96-5)
EPA Substance Registry System 1,4-Dioxane-2,5-dione, 3,6-dimethyl- (95-96-5)

Safety information for DL-Lactide

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H319:Serious eye damage/eye irritation
Precautionary Statement Codes P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for DL-Lactide

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