UGO 633 NHS ester [equivalent to ATTO 633 NHS ester]

UGO 633 is a bright-red fluorescent dye known for its strong absorption, high fluorescence quantum yield, and exceptional photo and thermal stability. It exhibits moderate hydrophilicity and is optimally excited within the 610-645 nm wavelength range, making it compatible with both the 633 nm line of the He-Ne laser and the 635 nm line of the diode laser. The dye maintains stable fluorescence over a wide pH range (2-11), enabling its use in various experimental conditions. Upon conjugation to a substrate, UGO 633 becomes cationic, carrying a net positive charge of +1. These properties make UGO 633 particularly well-suited for high-precision applications, including single-molecule detection and super-resolution microscopy techniques such as PALM, dSTORM, and STED. It is also compatible with flow cytometry (FACS), fluorescence in situ hybridization (FISH), and various other biological assays. Chemical Properties Storage Upon receipt, store at -20°C in the dark. Protect from light and moisture. When stored as indicated, UGO NHS-esters are stable for at least 3 years. This product is for Research Use Only· Not for Human or Veterinary or Therapeutic Use CAS number 2982226-58-2 Formula C39H45ClN4O5 Molecular Weight (M+) 649 HPLC Purity >95% lambdaabs (nm) 630 epsilonmax (M-1 cm-1) 1.3x10^5 lambdafl (nm) 651 etafl 64% taufl (ns) 3.3 CF260 =epsilon260/epsilonmax 0.04 CF280 =epsilon280/epsilonmax 0.05