Cyanine5azidelabelingreagentforClickchemistry,availableas10mMsolutioninDMSO,andinsolidform.
Thisazideissolubleinorganicsolvents(e.g.DMSO,DMF),thereforethelabelingreactionshouldbecarriedoutwithasmallamountofanorganicco-solvent.Thisazidecanbeusedforthelabelingofalkyne-modifiedbiomoleculesinmixturesofwaterwithorganicsolvents.ThesolutioninDMSOisreadyforuseinbioconjugation.Awater-solublesulfonatedversionofthisreagentisalsoavailable.
Cyanine5isananalogofCy5®,oneofthemostcommonlyusedfluorophoreswhichiscompatIBLewithvariousinstruments.Cyanine5canalsobeusedasareplacementforAlexaFluor®647,andDyLight®649.
Generalproperties
| Appearance: | darkbluepowder/solution | 
| Molecularweight: | 601.22 | 
| Molecularformula: | C35H45ClN6O | 
| Solubility: | solubleinorganicsolvents(DMSO,DMF,dichloromethane),lowsolubilityinwater | 
| Qualitycontrol: | NMR1H,HPLC-MS(95%) | 
| Storageconditions: | Storage:24monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. | 
Spectralproperties
| Excitationmaximum,nm: | 646 | 
| ε,L⋅mol−1⋅cm−1: | 250000 | 
| Emissionmaximum,nm: | 662 | 
| Fluorescencequantumyield: | 0.2 | 
| CF260: | 0.03 | 
| CF280: | 0.04 |