Merck
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93711

Sigma-Aldrich

Atto 655

BioReagent, suitable for fluorescence, ≥85% (HPLC)

MDL number:
PubChem Substance ID:
NACRES:
NA.32

Quality Level

product line

BioReagent

assay

≥85% (HPLC)

form

powder

manufacturer/tradename

ATTO-TEC GmbH

fluorescence

λex 655 nm; λem 680 nm in 0.1 M phosphate pH 7.0

suitability

suitable for fluorescence

storage temp.

−20°C

InChI

1S/C27H33N3O6S/c1-4-29-9-5-7-17-11-20-24(13-22(17)29)36-25-14-23-19(12-21(25)28-20)18(16-37(33,34)35)15-27(2,3)30(23)10-6-8-26(31)32/h11-14,18H,4-10,15-16H2,1-3H3,(H-,31,32,33,34,35)

InChI key

FOYVTVSSAMSORJ-UHFFFAOYSA-N

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Application

Atto labels are designed for highest sensitivity applications. A unique combination of advantages makes them highly favorable tools for all kinds of labeling applications. Some of their properties make them specifically interesting for single molecule detection. Atto labels are based on rigid structures and do not show any cis-trans-isomerization, which lowers the brightness of signals and leads to environment dependency, e.g., spectral shifts by conjugation.
Atto 655 shows a molar extinction of 110,000 and QY of 30% in water (50% in ethanol). Decay time is 1.9 ns.

Other Notes

New red absorbing fluorescent dye with best signal-to-noise ratio and long fluorescence life-time. Useful as a biophysical probe for binding interactions.

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificate of Analysis

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Certificate of Origin

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