Chromotropic acid disodium is a versatile dye utilized in numerous fields. Dyes play a crucial role in biological research, assisting scientists in cell structure observation, biomolecule tracking, cell function evaluation, cell type distinction, biomolecule detection, tissue pathology studies, and microorganism monitoring. Their uses extend from fundamental scientific investigations to a broad array of clinical diagnostics. Additionally, dyes find applications in traditional areas like textile dyeing and are increasingly important in emerging sectors such as functional textile processing, food pigmentation, and dye-sensitized solar cells.