ATT 550 NHS ester

Cat. # Quantity Price Lead time
1C920 1 mg
$159
in stock
2C920 5 mg
$640
in stock
4C920 25 mg
$1640
in stock
5C920 50 mg
$2090
in stock
6C920 100 mg
$2840
in stock
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ATT 550 NHS ester is an amine-reactive dye for labeling various amine-containing molecules in the aqueous phase. To prepare labeling solutions, dissolve the reagent in anhydrous, amine-free DMF, or DMSO immediately before use.

ATT 550 is a yellow-fluorescent Rhodamine 6G and Rhodamine B-related dye with high fluorescence quantum yield, strong thermal and photostability, and excellent water solubility. ATT 550 is a cationic dye. After coupling to a substrate, the dye carries a net electrical charge of +1.

Absorption and emission spectra of ATT 550

Absorption and emission spectra of ATT 550

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General properties

Appearance: dark reddish-brown crystals
Molecular weight: 791.30
Molecular formula: C41H47ClN4O10
Solubility: good in acetonitrile, DMF, methylene chloride; moderate in ethyl acetate; poor in water; insoluble in diethyl ether
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.
MSDS: Download
Product specifications

Spectral properties

Excitation/absorption maximum, nm: 556
Emission maximum, nm: 574
CF260: 0.27
CF280: 0.20
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