SRfluor® 680 Carboxyl

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24863-1 1 mg
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A far-red emitting dye, belonging to the squaraine rotaxane family of dyes, which bears a free carboxyl group that can be coupled to free amino groups. Spectral properties: abs max = 650 nm and emission max = 678 nm. Provided in Crystalline Powder form.


  • Improved chemical and photochemical stability compared with squaraines, cyanines, Alexa® and Atto dyes.
  • Exhibit sharp absorption and emission bands thus provide reduced excitation and emission cross talk into channels where other fluorochromes are being used.
  • Do not exhibit aggregation induced spectral broadening under biological conditions at micromolar concentrations.
  • 5-20X brighter compared with cyanines, Alexa® and Atto dyes.
  • Photophysical properties stable over the pH range from 2-12.
  • Spectral properties compatible with the 633nm or 647nm laser lines on flow cytometers, confocal and in vivo imaging equipment.

For additional information refer to Data Sheet

Molecular Weight:
Refer to Data Sheet

MSDS / Technical Data Sheets / Product Literature