9073. Tartronic Acid

Nomenclature

CAS number: 80-69-3
2-Hydroxypropanedioic acid; hydroxymalonic acid.
C3H4O5; mol wt 120.06.
C 30.01%, H 3.36%, O 66.63%.

Description and references

Prepd by ozonization of malonic acid in aq soln: Dobinson, Chem. Ind. (London) 1959, 853.

Chemical structure

Properties

Colorless, odorless crystals. Crystallizes from water with and 1H2O. Becomes anhydr at 60°. Sublimes 110-120°. mp 158-160° with decompn (CO2 evolved). pK1 2.42; pK2 4.54, see Grandjean, Bull. Soc. R. Sci. Liege 38, 288 (1969), C.A. 72, 42684t (1970). Very sol in water, alcohol; the anhydrous acid is sol in ether.