MB 660R Acid

Catalog#

Unit Size

Price (USD)

Availability

Qty

Cat.#: 1660-5

Unit size: 5 mg

$295.00

in stock

Cat.#: 1660-25

Unit size: 25 mg

$1,095.00

in stock

Cat.#: 1660-100

Unit size: 100 mg

$2,095.00

in stock

MB™ 660R is a bright and photostable far-red dye that emits fluorescence at about 685 nm in the borderline spectral region between far-red and near-IR. Although the absorption maximum is at around 665 nm, this dye can be sufficiently excited by the 633 or 635 nm laser. MB™ 660R dye is water soluble and pH-insensitive from pH 4 to pH 10. MB 660R is a rhodamine-based dye, and like rhodamine dyes in general, it is exceptionally photostable (Figure 1, description tab). The superior photostability and excellent brightness of MB 660R make the dye an ideal choice for confocal microscopy and other demanding applications.

MB™ 660R Acid often used for the preparation of custom activated esters that often are not commercially available.

Specifications
Description
Structure
Abs/Em Spectra
Documents

Reactivity

Primary amine

Abs/Em Maxima

665/690 nm

Extinction coefficient

92,000 cm-1M-1

Solubility

Water, DMSO, DMF

Spectrally similar dyes

Alexa Fluor® 660, CF® 680R

Molecular weight

743.86 (protonated)

Storage conditions

-20C

Shipping conditions

Ambient temperature

MB™ 660R Acid often used for the preparation of custom activated esters that often are not commercially available. Examples of such activated esters include sulfo-NHS, TFP (2,3,5,6-Tetrafluorophenol), and STP (4-Sulfo-2,3,5,6-Tetrafluorophenol, Sodium Salt). Another common application for the non-activated carboxylic acid is peptide modification during solid phase synthesis, which usually requires in-situ activation with peptide coupling regents, e.g. HATU.

MB™ 660R is a bright and photostable far-red dye that emits fluorescence at about 685 nm in the borderline spectral region between far-red and near-IR. Although the absorption maximum is at around 665 nm, this dye can be sufficiently excited by the 633 or 635 nm laser. MB™ 660R dye is water soluble and pH-insensitive from pH 4 to pH 10. MB 660R is a rhodamine-based dye, and like rhodamine dyes in general, it is exceptionally photostable (Figure 1). The superior photostability and excellent brightness of MB 660R make the dye an ideal choice for confocal microscopy and other demanding applications.

MB 660R dye spectrally is almost identical to Alexa Fluor® 660 and CF® 660R Dye and can be used a less expensive alternative to these dyes.

Alexa Fluor® is a registered trademark of Thermo Fisher Scientific. CF® Dye is a registered trademark of Biotium.