How are Perfumes Classified?

Perfumes are classified based on the concentration of aromatic compounds, which determines their intensity and longevity. The primary categories are:

1. Eau de Cologne: Light, with 2-4% fragrance oil, offering a fresh, short-lived scent.
2. Eau de Toilette: Medium concentration at 4-15%, providing a balanced, moderately long-lasting aroma.
3. Eau de Parfum: Richer at 15-20%, offering a more intense and longer-lasting fragrance.
4. Perfume or Parfum: The most concentrated, with 20-30% fragrance oil, delivering a powerful, enduring scent.