AF 555 NHS ester

Cat. # Quantity Price Lead time
1K820 1 mg $140 in stock
2K820 5 mg $450 in stock
4K820 25 mg $1460 in stock
5K820 50 mg $1890 in stock
6K820 100 mg $2640 in stock
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AF 555 NHS ester is a bright, photostable, and hydrophilic fluorescent dye for the yellow channel. This NHS ester is an amine-reactive dye; it can label amine groups in proteins, peptides, amino-modified oligos, and other target molecules.

AF 555 is a hydrophilic fluorophore with high fluorescence quantum yield and high photostability, an alternative to tetramethylrhodamine (TAMRA, TMR) or Cyanine3 dyes. The dye is useful for many applications, including cytometry and microscopy.

Absorption and emission spectra of AF 555

Absorption and emission spectra of AF 555

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General properties

Appearance: dark red powder
Molecular weight: 1058.36
Molecular formula: C39H46K3N3O16S4
Quality control: NMR 1H and HPLC-MS (95+%)
Storage conditions: 12 months after receival at -20°C in the dark. Transportation: at room temperature for up to 3 weeks. Desiccate. Avoid prolonged exposure to light.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 552
ε, L⋅mol−1⋅cm−1: 152000
Emission maximum, nm: 566
Fluorescence quantum yield: 0.14
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