This category encompasses a diverse range of ancillary dyes and crucial chemical building blocks for research and development. It includes histological stains (e.g., DAPI, Hoechst), chemical sensors, and key synthetic intermediates for constructing custom fluorescent molecules. These intermediates, such as reactive precursors and protected synthons, facilitate the custom synthesis of novel probes and dyes. This portfolio provides researchers and developers with the foundational components and specialized tools needed for assay development, material science, and the creation of bespoke imaging agents.