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Sigma-Aldrich

Atto 550

suitable for fluorescence, ≥90% (HPLC)

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1 MG
$236.00

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1 MG
$236.00

About This Item

MDL number:
UNSPSC Code:
12352108
NACRES:
NA.32

$236.00


Available to ship onMay 20, 2025Details


Request a Bulk Order

Quality Level

assay

≥90% (HPLC)

form

powder

manufacturer/tradename

ATTO-TEC GmbH

λ

in ethanol (with 0.1% trifluoroacetic acid)

UV absorption

λ: 553-559 nm Amax

suitability

suitable for fluorescence

storage temp.

−20°C

General description

Atto 550 is a new label with high molecular absorption (120,000) and quantum yield (0.80) as well as sufficient Stokes shift between excitation and emission maximum. Atto 550 can be used with similar excitation source and fluorescence filters as Cy3 and is characterized by a high photostability.

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Application

Atto fluorescent labels are designed for high sensitivity applications, including single molecule detection. Atto labels have rigid structures that do not show any cis-trans-isomerization. Thus these labels display exceptional intensity with minimal spectral shift on conjugation. Atto 550, which is similar to Cy3, may be useful in applications such as fluorescence resonance energy transfer (FRET) and as a tag for molecules such as secondary antibodies.

Legal Information

This product is for Research use only. In case of intended commercialization, please contact the IP-holder (ATTO-TEC GmbH, Germany) for licensing.
Cy3 is a trademark of Cytiva

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)


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Articles

Fluorescence lifetime measurement is advantageous over intensity-based measurements. Applications include fluorescence lifetime assays, sensing and FLI.

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