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ROX NHS ester, pure 6-isomer|117491-83-5 ROX (rhodamine X aka R101) is a highly fluorescent, and photostable rhodamine dye for various applications. ROX labeled oligonucleotide probes are often used in qPCR, and qPCR instruments have ROX channel. This is reactive dye for the labeling of amino-groups in peptides, proteins, and amino-oligonucleotides. Pure single isomer. This dye can replace Alexa Fluor 568, Texas Red.        ROX NHS ester, pure 6-isomer|117491-83-5     General properties： Appearance: dark crimson powder Mass spec M+ increment: 516.2 Molecular weight: 631.67 CAS number: 117491-83-5 Molecular formula: C37H33N3O7 Solubility: good in polar organic solvents (DMF, DMSO), low in water Quality control: NMR 1H, HPLC-MS (80+%, balance mostly free carboxylic acid) Storage conditions: Storage: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light. Desiccate.   Spectral properties： Excitation maximum, nm: 570 ε, L⋅mol−1⋅cm−1: 82000 Emission maximum, nm: 591 Fluorescence quantum yield: 1.0 NHS    N-羟基琥珀酰亚胺脂Dye NHS esters Pyrenebutyric acid NHS ester ROX NHS ester, pure 6-isomer BDP FL NHS ester FAM NHS ester Cyanine3 NHS ester Cyanine3.5 NHS ester Cyanine5 NHS ester Cyanine5.5 NHS ester Cyanine7 NHS ester Cyanine7.5 NHS ester Sulfo-Cyanine3 NHS ester Sulfo-Cyanine5 NHS ester sulfo-Cyanine5 bis-NHS ester Sulfo-Cyanine7 NHS ester