Disperse Yellow 65 (CAS 10116-20-8), a common azo-based disperse dye, typically has a molecular formula aligned with its azo chromophore structure (e.g., C??H??N?O?, molecular weight ~354.36 g/mol). It is widely used to dye hydrophobic fibers like polyester, nylon, and acetate, delivering bright yellow hues due to its conjugated azo group (-N=N-). It requires sealed storage in a cool, dry, dark place to prevent fading, photodegradation, or moisture absorption, ensuring color stability for textile and industrial dyeing applications.