POLYTHERMAL SOLUBILITY AND PHASE EQUILIBRIA IN THE ACETATE CARBAMIDE–ETHANOLAMINE–WATER SYSTEMS AND THEIR POTENTIAL APPLICATION IN AGROCHEMICAL SYNTHESIS.

The study investigates the polythermal solubility and phase equilibria of the ternary systems acetate carbamide–ethanolamine–water over a temperature range from –56.2 °C to 18 °C. The polythermal solubility diagrams were constructed based on multiple cross-sections, revealing the crystallization fields of ice, acetate carbamide, ethanolamines, and newly formed compounds-acetate carbamide-diethanolammonium and acetate carbamide-triethanolammonium. The position of secondary and ternary eutectic points was determined, indicating the complex phase behavior of these multicomponent aqueous systems. The phase boundaries and temperature–composition relationships were established experimentally. The obtained data provide valuable physicochemical insights for developing innovative agrochemical preparations, as the newly formed compounds exhibit promising potential as active ingredients in fertilizers and plant growth regulators. These results contribute to the rational design of efficient and environmentally safe agrochemical systems.