AF488 azide

Cat. # Quantity Price Lead time
11830 1 mg $110.00 in stock
21830 5 mg $290.00 in stock
41830 25 mg $690.00 in stock
51830 50 mg $1270.00 in stock
61830 100 mg $1990.00 in stock

AF488 is a fluorescent dye that is completely identical to Alexa Fluor™ 488. AF488 is a fluorophore pH-insensitive over a broad range from 4 to 10. It has an absorption maximum at 495 nm and an emission maximum at 519 nm in the green spectrum region. The dye is hydrophilic and can be used to introduce the fluorescent label into various molecules, including proteins and antibodies. Conjugates of molecules with AF488 have high brightness and photostability and are commonly used in flow cytometry and microscopy. This allows biological objects detection with high sensitivity and a long excited-state lifetime.

AF488 azide interacts with alkynyl biomolecules derivatives in Click Chemistry reactions either in the presence of copper (I) catalyst (with terminal alkynes) or without catalyst (with cyclooctynes), leading to the formation of stable adducts.

Absorption and emission spectra of AF488

Absorption and emission spectra of AF488

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General properties

Appearance: orange solid
Mass spec M+ increment: 616.1
Molecular weight: 825.01
CAS number: 1679326-36-3 (with azidohexyl group)
Molecular formula: C36H56N8O10S2
Solubility: good in water, DMF, DMSO
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. Desiccate.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 495
ε, L⋅mol−1⋅cm−1: 71800
Emission maximum, nm: 519
Fluorescence quantum yield: 0.91
CF260: 0.16
CF280: 0.10
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