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Quasar® 670 carboxy acid is used to label peptides, oligonucleotides or functionalized amines. Quasar 670 is an indocarbocyanine which fluoresces in the red region of the visible spectrum; it excites at 644 nm and emits at 670 nm. This compound is a direct replacement for Cy™5. BHQ®-2 will quench the Quasar 670 moiety.
Properties:
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Chemical Name:
Indo-5-carbocyanine N-ethyl-N'-hexanoic acid
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Formula:
C33H41N2O2+
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Molecular Weight:
497.69
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Appearance:
blue solid
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Absorption Maximum (Lambda Max):
644
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Extinction Coefficient at Lambda max:
250000
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Fluorescence Maximum:
670
Spectral properties measured in MeOH.
Product usage:
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Synthesis conditions:
Prior to dilution ensure that all product is at the bottom of the vial. Following dilution, mix thoroughly in sealed vial to ensure that all contents are dissolved.
This product will dissolve in MeCN, DMF and DMSO.
Quasar 670 is light sensitive material. Prolonged exposure to light may cause photo bleaching.
This product is susceptible to oxidation when exposed to air or stored undessicated.
Storage and handling:
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Shipping conditions:
Ambient
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Storage conditions:
-15 to -30 °C
