Sucrose solubility was measured in binary and ternary mixtures of alcohol, acid, ester, and water at different temperatures. New data were measured for the solubility of sucrose in mixtures of 2-methyl-2-butanol (tert-pentanol) with water at 30 degreesC and 60 degreesC, propionic acid with water at 30 degreesC, methyl and ethyl acetate with water at 40 degreesC and 50 degreesC, and octanoic acid with tert-pentanol at 60 degreesC and in diacetone alcohol at 60 degreesC. Solubility measurements were also performed in multicomponent mixtures similar to those encountered in the enzymatic synthesis of fatty acid sucrose esters. Sucrose solubility was measured in mixtures of water with tert-pentanol and sucrose palmitate and in mixtures of water with tert-pentanol, sucrose palmitate and palmitic acid at constant water activity (a(w) = 0.1) at 60 degreesC. Little solubilization of sucrose in small chain esters and tert-pentanol was observed. The solubility of sucrose in tert-pentanol increases in the presence of sucrose ester and the opposite effect in the presence of palmitic acid.