Research Information System
4th INTERNATIONAL CONFERENCE ON INNOVATIONS IN NATURAL SCIENCE AND ENGINEERING (ICINSE 2022), vol.1, no.1, pp.101-102, 2022 (Conference Book)
As a result of the research conducted with the methods of physico-chemical analysis, it was determined that the reason for the deterioration of hand soaps during storage is that they are oxidized by the oxygen of the air and change their aroma and color. As a result of the conducted experiments, it was determined that the formation of one or another final product in soaps depends on the composition of its fatty acid and refresher, as well as on storage conditions.
It has been established that the change in the organoleptic and sanitary-hygienic indicators of soap is caused by two main and independent reasons: oxidation by air oxygen and dehydration during storage.
The deterioration of soaps is caused by the appearance of oxidation products in them, giving to the soap a specific smell and color. The formation of certain end products of soap rancidity depends on its fatty acid and component composition of the introduced fragrances, as well as storage conditions.This paper presents the results of the oxidation of soap samples, the introduction of fragrances, prepared by the introduction of heptylcyclopentanone, air oxygen in a stationary mode.
It has been established that the products formed and accumulated in soap during their oxidation differ from each other for products of aldehyde and ketone rancidity in their composition.
It has been established that soaps obtained on the basis of acids with many double bonds in the molecule quickly oxidize and accelerate the rancidity of the soap, as a result of which the shelf life of the soap decreases. It has been shown that, depending on the used perfume used, during the oxidation for 10-20 minutes, a band of 3720 cm-1 corresponding to the –OOH group of the hydroperoxide appears in the oxidate [3,4].
It has been established that ketone rancidity occurs under the action of light energy and by the oxidation of free acids and their esters, as well as ketones and aldehydes introduced into soap fragrance.
Keywords: hand soap, bitterness, storage, reactions during storage.