Physicochemical properties of the new drug Penox-1

The physicochemical properties of the substances included in the composition of the new disinfectant Penox-1 have been studied. Assessment of its disinfecting properties of veterinary in-spection objects, with the study of solubility in water and sodium chloride, surface tension of solutions, stability and adhesion of foam on vertical and ceiling test surfaces in laboratory conditions. At the initial stage, the temperature dependence of the solubility of slaked lime in water was es-tablished. It was determined by the change in the activity of OH- ions as the temperature of the over-saturated solution of slaked lime increased. Distilled water was used as a solvent. The solubility of slaked lime was also studied by adding 1.0; 3.0; 5.0 and 10.0 % sodium chloride solution. The experi-ments were carried out according to the method "On the procedure for testing new disinfectants for veterinary practice (1987)". Assessment with the study of the surface tension of solutions, resistance and adhesion of foam was carried out at the Institute of Physics, DSCRAN, also according to the indi-cated method. As a result of the experiments, it was found that with an increase in water temperature, the sol-ubility of slaked lime in it decreases. Adding 1 and 3% sodium chloride solution to a 90 % solution of slaked lime, the solubility increases by 2.15 and 2.2 times, respectively. With an increase in sodium chloride content to 5%, the solubility of hydrated lime begins to decrease. The presence in the solution of 20 % slaked lime and 3 % sodium chloride solution, 5 % foaming agent (PO-6k) reduces surface ten-sion and increases foam stability. It was also found that the thickness of the foam layer depends on the type of surface. The critical thickness of the foam layer on vertical surfaces was from 1 to 4 cm, on the ceiling – from 2 to 7 cm. The stability of the foam depends on its concentration in the solution. The foam content up to 5–6 % in the solution increased the resistance on vertical surfaces up to 16 minutes, and on ceiling surfaces up to 18 minutes.