ROX azide, 5-isomer

Cat. # Quantity Price Lead time
A1230 1 mg $110 in stock
B1230 5 mg $165 in stock
C1230 10 mg $210 in stock
D1230 25 mg $285 in stock
E1230 50 mg $495 in stock
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ROX azide is an alkyne-reactive derivative of ROX (Rhodamine X, Rhodamine 101) dye. ROX is a red-emitting fluorophore possessing high brightness and fluorescence quantum yield. This reagent is a pure 5-isomer. It is used for labeling alkyne and cycloalkyne-containing biomolecules via copper-catalyzed and copper-free click chemistry reactions.

Absorption and emission spectra of ROX dye

Absorption and emission spectra of ROX dye

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General properties

Appearance: dark crimson powder / red solution
Molecular weight: 616.71
CAS number: 2628213-67-0
Molecular formula: C36H36N6O4
Solubility: good in polar organic solvents (DMF, DMSO, alcohols), low in water
Quality control: NMR 1H, HPLC-MS (95%)
Storage conditions: Storage: 24 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Avoid prolonged exposure to light.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 570
ε, L⋅mol−1⋅cm−1: 93000
Emission maximum, nm: 591
Fluorescence quantum yield: 1.0
CF260: 0.62
CF280: 0.49

Product citations

  1. Ferguson, T.E.G.; Reihill, J.A.; Martin, S.L.; Walker, B. Novel Inhibitors and Activity-Based Probes Targeting Trypsin-Like Serine Proteases. Frontiers in Chemistry, 2022, 10, 782608. doi: 10.3389/fchem.2022.782608
  2. Feltes, M.; Moores, S.; Gale, S.E.; Krishnan, K.; Mydock-McGrane, L.; Covey, D.F.; Ory, D.S.; Schaffer, J.E. Synthesis and characterization of diazirine alkyne probes for the study of intracellular cholesterol trafficking. Journal of Lipid Research, 2019, 60(3), 707–716. doi: 10.1194/jlr.D091470
  3. Verardi, R.; Kim, J.-S.; Ghirlando, R.; Banerjee, A. Structural Basis for Substrate Recognition by the Ankyrin Repeat Domain of Human DHHC17 Palmitoyltransferase. Structure, 2017, 25(9), 1337–1347. doi: 10.1016/j.str.2017.06.018
  4. Bak, D.W.; Pizzagalli, M.D.; Weerapana, E. Identifying Functional Cysteine Residues in the Mitochondria. ACS Chemical Biology, 2017, 12(4), 947–957. doi: 10.1021/acschembio.6b01074
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