5339. Lactic Acid Lactate

Nomenclature

CAS number: 617-57-2
2-Hydroxypropanoic acid 1-carboxyethyl ester; 2-(lactoyloxy)propanoic acid; 2-(2-hydroxypropanoyloxy)propanoic acid.
C6H10O5; mol wt 162.14.
C 44.45%, H 6.22%, O 49.34%.

Description and references

Prepd by heating lactic acid at 120° for 10 hours: Dietzel, Krug, Ber. 58, 1307 (1925).

Chemical structure

Properties

Pale yellow, clear, odorless oil. Sol in water and in the usual organic solvents.

Derivative

Methyl ester.
C7H12O5; mol wt 176.17.
C 47.72%, H 6.87%, O 45.41%.

Description and references

Prepn: Claborn, US 2371281 (1945 to the people of the U.S.).

Properties

bp7.8 107°; nD20 1.4313.

Use

The methyl ester as a solvent or plasticizer.