Photoacoustic contrast agent-2 (perchlorate) serves as a versatile dye that holds significance across various domains. Primarily utilized in biological experimentation, this dye facilitates the observation and analysis of cellular structures, tracking of biomolecules, and evaluation of cell functions. It aids in distinguishing different cell types, detecting biomolecules, studying tissue pathology, and monitoring microorganisms. The applications of such dyes extend beyond basic research into clinical diagnostics, encompassing traditional roles in textile dyeing and novel uses in functional textile processing, food pigments, and dye-sensitized solar cells.