Lactic acid O-carboxyanhydride

Lactic acid O-carboxyanhydride
Names
	IUPAC name 5-Methyl-1,3-dioxolane-2,4-dione
Identifiers
CAS Number	17578-13-1;
3D model (JSmol)	Interactive image;
ChemSpider	11239219;
ECHA InfoCard	100.116.276
EC Number	605-761-8;
PubChem CID	22227598;
	InChI InChI=1S/C4H4O4/c1-2-3(5)8-4(6)7-2/h2H,1H3 Key: JLXQJNCZXSYXAK-UHFFFAOYSA-N; InChI=1/C4H4O4/c1-2-3(5)8-4(6)7-2/h2H,1H3 Key: JLXQJNCZXSYXAK-UHFFFAOYAX;
	SMILES O=C1OC(=O)OC1C;
Properties
Chemical formula	C4H4O4
Molar mass	116.072 g·mol−1
Melting point	28 °C (82 °F; 301 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Lactic acid O-carboxyanhydride (lac-OCA) is an organic compound. It is used as a monomer equivalent to lactic acid or lactide in the preparation of poly(lactic acid). When this monomer undergoes ring-opening polymerization, one equivalent of carbon dioxide gas is released for every lactic acid unit incorporated into the polymer:[1]

This compound is prepared by treatment of lactic acid or its salts with phosgene or one of its equivalents, e.g. diphosgene.[1]

References

Kricheldorf, Hans R.; Jonté, J. Michael (1983). "New polymer syntheses". Polymer Bulletin. 9 (6–7): 276–283. doi:10.1007/BF00262719.

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[kricheldorf-1] Kricheldorf, Hans R.; Jonté, J. Michael (1983). "New polymer syntheses". Polymer Bulletin. 9 (6–7): 276–283. doi:10.1007/BF00262719.