Manynaturalandsyntheticmoleculescontainaldehydeorketonecarbonylgroups.Thesecarbonylsreactwithhydrazideswiththeformationofhydrazones.ThereactionisspontaneousatpHvaluesaroundneutral,andtheresultinghydrazonesareverystable.
Compoundscontaining1,2-diolfunction,likesugars,canbeoxidizedwithsodiumperiodatewiththeformationofcarbonylcompoundsforthesubsequentmodificationwithhydrazides.Thisisanefficientmethodforthelabelingofglycoproteins(likeantibodies),andpolysaccharides.
FAMhydrazideisahydrazidelabelfortheattachmentoffluorescein,abrightdyefor488nmchannel,tocarbonylcompounds.
Generalproperties
| Appearance: | yellowsolid | 
| MassspecM+increment: | 372.07 | 
| Molecularweight: | 426.81 | 
| Molecularformula: | C21H15N2ClO6 | 
| Solubility: | goodinethanol,DMF,DMSO | 
| Qualitycontrol: | NMR1H,HPLC-MS(95%) | 
| Storageconditions: | Storage:24monthsafterreceivalat-20°Cinthedark.Transportation:atroomtemperatureforupto3weeks.Avoidprolongedexposuretolight.Desiccate. | 
Spectralproperties
| Excitationmaximum,nm: | 494 | 
| ε,L⋅mol−1⋅cm−1: | 75000 | 
| Emissionmaximum,nm: | 520 | 
| Fluorescencequantumyield: | 0.9 | 
| CF260: | 0.20 | 
| CF280: | 0.17 |