[Hygienic research on new soap preparations for intensive laundry use]

Area of Science:

• Dermatology
• Cosmetic Science
• Chemical Engineering

Background:

• The increasing demand for effective and safe intensive washing preparations necessitates rigorous evaluation of their hygienic properties and dermatological compatibility.
• Understanding the chemical composition and potential skin interactions of novel washing agents is crucial for consumer safety and product development.

Purpose of the Study:

• To assess the hygienic characteristics of five new intensive washing preparations from the "Verila" company.
• To determine the effects of these preparations on human skin, evaluating both irritative and allergenic potential.

Main Methods:

• Sanitary and chemical analyses were conducted on five washing preparations, examining parameters such as surface-active substances, carbamide, and free alkali.
• Epicutaneous testing was performed on 125 volunteers using varying concentrations (0.5%-20%) of the washing preparations over a 30-day period to assess skin reactions.

Main Results:

• Chemical analyses confirmed the absence of ammonium nitrate and formaldehyde in the preparations.
• All tested washing preparations, including "Linda" (except for samples from the trade network), met declared content norms.
• No instances of skin irritation or allergic reactions were observed in any of the 125 volunteers across all tested preparations and concentrations.

Conclusions:

• The new intensive washing preparations exhibit favorable hygienic properties and are safe for human skin, showing no irritative or allergenic effects.
• Recommendations were made to the manufacturer regarding adherence to technological discipline and packaging requirements to ensure consistent product quality.