Drug Chemicals like Unilab Cetrimide Solution 40%, 1% Gentian Violet, and Benzalkonium Chloride are crucial for Seborrheic Dermatitis, Scalp Psoriasis, wound cleansing, and minor burns. Liquid form ensures easy application. Dosage as per instructions. Advantages include efficacy, versatility, and ease of storage. They disinfect, soothe, and promote healing effectively.