When sourcing perfumes, the Fragrance Concentration is the primary indicator of quality and longevity. Parfum (20-30%) and Eau de Parfum (EDP, 15-20%) offer the highest value for premium markets, while Eau de Toilette (EDT, 5-15%) is ideal for mass-market retail. Buyers must verify the Scent Pyramid (Top, Middle, and Base notes) to ensure complexity and stability. Additionally, check the Alcohol Purity (typically 95-99% denatured ethanol) to ensure a clean evaporation process without skin irritation.