Hyaluronic Acid–Rhodamine B (HA-RhB)，MW 3K

A fluorescently labeled hyaluronic acid conjugate, formed by covalently attaching Rhodamine B (Ex/Em ~544/576 nm) to a low‑molecular‑weight HA backbone (3 kDa). It combines HA’s biocompatibility, CD44‑targeting, and aqueous solubility with RhB’s bright orange‑red fluorescence. Typically supplied as a lyophilized powder (purity ≥95%), stored at −20 °C under dark, dry conditions. Used for in vitro cell tracking, live‑cell imaging, targeted drug delivery visualization, and biopolymer tracing in biomedical research.