Rhodamine b

Rhodamine B (CAS 81-88-9), also known commercially as Symulex Magenta F and Rheonine B, is a synthetic xanthene dye producing an intense fluorescent pink-to-violet coloration. It functions as a high-brightness colorant and fluorescent tracer across industrial dyeing, coating, and printing applications.

In textile processing, this compound dyes natural and synthetic fibers with strong fluorescent pink shades, particularly in silk, wool, and paper coloration. Printing ink formulators incorporate it into flexographic and gravure systems where vivid magenta tones and fluorescence under UV light are required.

Coatings and plastics manufacturers use it as a fluorescent pigment additive to produce visually distinctive coloration in films, resins, and polymer compounds. It also functions as a photosensitizer and catalyst precursor in certain photopolymerization and cross-linking systems.

These systems are frequently used in adhesive and sealant formulations. The chemical is supplied as a crystalline powder or granules, typically in deep green iridescent form that dissolves to produce its characteristic pink-violet hue.

Technical and industrial grades are the primary commercial offerings, with purity specifications commonly ranging from 85% to 99% depending on application requirements. Bulk quantities are available for industrial buyers, with smaller packaging options for laboratory use.

The material is handled according to standard industrial safety protocols. It remains a staple in the specialty chemical sector due to its high molar extinction coefficient and reliable performance in diverse solvent systems and polymer matrices.