OBTAINING AN ACTIVE INGREDIENT FOR COTTON SEED TREATMENT BASED ON METHYLENDIUREA AND PARAAMINOBENZOIC ACID AND STUDYING ITS PHYSICOCHEMICAL CHARACTERISTICS

Abstract

Seed treatment is the main method of protecting plants from infectious diseases. The
article presents data on the production of a double compound based on methylene diurea and paraaminobenzoic acid and the study of its physicochemical characteristics. The chemical interaction in the
three-component water-salt system methylenediurea (MDU) – para-aminobenzoic acid (PABA) – water
was studied using the isothermal method of physicochemical analysis. The crystallization region of the
new binary compound, the active substance, was established at a molar ratio MDU: PABA = 1:2.
The formation of the double compound is confirmed by X-ray phase and IR spectroscopic methods
of analysis. From the obtained X-ray phase analysis data, it follows that the reference lines of the double
compound and their intensity differ from the X-ray patterns of the initial components. The IR spectra of
MDM and PABA are characterized by intense absorption in the region of 3500-3390 cm-1
, 2000-500 cm-1
and 3500-3345 cm-1
, 1800-500 cm-1
, respectively. In the IR spectra of the new double compound
MDM•2PABA, the absorption intensity in the region of 1800-500 cm-1
increases. A decrease in the
absorption region of the stretching vibration of CO groups from 1626, 1626.3 cm-1
to 1612 cm-1
is
observed in the case of the double compound MDM•2PABA. The results of the studies indicate the
formation of a new compound.
It is shown that the double compound has low hygroscopicity under summer, autumn, spring and
winter storage conditions, high swelling and moisture capacity, and low solubility.