Lactide

Lactide

Names
Preferred IUPAC name 3,6-Dimethyl-1,4-dioxan-2,5-dione
Other names Dilactid
Identifiers
CAS Number	4511-42-6 [(S,S)-Lactide] Y 25038-75-9 [(R,R)-Lactide] N 13076-19-2 [(R,S)-Lactide = meso-Lactide] N 26680-10-4 [mixture of three isomers] Y 95-96-5 [mixture of three isomers][1] Y
3D model (JSmol)	Interactive image
ChemSpider	7002
ECHA InfoCard	100.002.245
EC Number	202-468-3
PubChem CID	7272
UNII	IJ13TO4NO1 [(S,S)-Lactide] Y 9J7G894K2M [mixture of three isomers] Y 7EH08MWO6M [mixture of three isomers] Y
CompTox Dashboard (EPA)	DTXSID7041253
InChI InChI=1S/C6H8O4/c1-3-5(7)10-4(2)6(8)9-3/h3-4H,1-2H3 Key: JJTUDXZGHPGLLC-UHFFFAOYSA-N
SMILES CC1C(=O)OC(C(=O)O1)C
Properties
Chemical formula	C6H8O4
Molar mass	144.126 g·mol−1
Melting point	95 to 97 °C (203 to 207 °F; 368 to 370 K) [(S,S)-Lactide and (R,R)-Lactide][2]
Solubility in water	Hydrolyses to lactic acid[2]
Solubility	soluble in chloroform, methanol slightly soluble in benzene [2]
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H319
Precautionary statements	P264, P280, P305+P351+P338, P337+P313
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Lactide is the lactone cyclic ester derived by multiple esterification between two (usually) or more molecules from lactic acid (2-hydroxypropionic acid) or other hydroxy carboxylic acid. They are designated as dilactides, trilactides, etc., according to the number of hydroxy acid residues. The dilactide derived from lactic acid has the formula [CH(CH₃)CO₂]₂. All lactides are colorless or white solids. This lactide has attracted interest because it is derived from abundant renewable resources and is the precursor to a biodegradable plastic.^[3]