Chanel No. 5 is a legendary, abstract floral aldehyde fragrance for women, launched in 1921, known for its complex, layered scent with bright citrus, a heart of rose and jasmine, and a warm, powdery base of vanilla, sandalwood, and musk. It is considered the quintessence of femininity and a symbol of timeless elegance, noted for its unique use of aldehydes that create an airy, soapy brightness.