Measurement and correlation of the solubility of urea l-tartaric acid in aqueous ethanol solution

Date on the solubility of urea l-tartaric acid in aqueous ethanol solution are essential for industrial design and further theoretical studies. Using a laser monitoring system, the solubility of urea l-tartaric acid in aqueous ethanol solution at different temperatures was measured using the synthetic method. For the temperature range investigated, the solubilities of urea l-tartaric acid in the solvents increased with increasing temperature. The solubility data were correlated with Apelblat equation and Buchowski–Ksiązczak λh equation. The Apelblat equation can regress the solubility data much better than Buchowski–Ksiązczak λh equation. This study provides valuable data for the mechanism and preparation of the available crystal form of urea l-tartaric acid.