Assessment of the quality of facial cleansing gels with the addition of amphoteric surfactants

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Key words:
facial gels, amphoteric surfactants, sulfobetaines.

Cleaning facial gels are the group of cosmetic products which purpose is to remove natural
and environmental impurities from the skin. This range of their use requires the proper design
of their composition. The common surfactants used in cosmetics are anionic cleansing
surfactants which may cause skin irritation and skin allergies. In view of that this kind of
cosmetic is applied directly to the face skin, without dilution, cleaning composition should
contain compounds with exceptionally mild activity. This was the prompted to take this subject. The example of mild surfactants may be, proposed in the article, amphoteric
surfactants from the suflobetain group. The article presents the results of research on the
impact of the type amphoteric surfactants on physicochemical and usable properties facial
We have elaborated and made five prototypes of cleansing facial gels with different type
(Cocamidopropyl Betaine, SB3C10, SB3C12) and ratio (2:0, 1:1, 0:2) of amphoteric
surfactants. Each formulation contained the amphoteric compounds with a total concentration
of 2%. Other components of face wash gels were: Sodium Laureth Sulfate, Sodium Chloride,
Cocamide DEA, Lactic Acid, Aqua, Preservative. For original cosmetics the following tests
were performed: pH, viscosity, emulsifiability of fatty impurities, foam-forming properties
and solubility. The properties of the original gels were compared with the reference
commercial product.
On the basis of the conducted experiments it was found that the application in facial
cleaning gels with different proportions of: commonly used in the cosmetic industry betaine
(Cocamidopropyl Betaine) and innovative sulphobetaines with different alkyl chain length
(C10 and C12) affects beneficially on modification of the physicochemical and functional
properties of these formulations.

Katarzyna DUDZIAK, Karolina WŁODARCZYK
Uniwersytet Technologiczno-Humanistyczny w Radomiu
Wydział Materiałoznawstwa, Technologii i Wzornictwa
Katedra Chemii