Fluorescein-PEG4-Acid


Fluorescein-PEG4-Acid

Catalog:CDPB-04810

Unit Size:25 mg, 50 mg, 250 mg

INQUIRY Datasheet

Specifications
Common Use Fluorescein-PEG4-Acid is a xanthene dye with excitation/emmission maximum 494/517 nm and a free terminal carboxyl acid. Terminal carboxylic acid can react with primary amine groups in the presence of of activators (e.g. EDC, or DCC) to form a stable amide bond. It be used as quantum yield standard. Hydophilic PEG spacer increases solubility in aqueous media and reduces steric hindrance during binding.
Structure Fluorescein-PEG4-Acid
PEG Molecular Weight 654.7 g/mol
Functional Group Carboxylic Acid
Fluorophores Fluorescein
Purity 96%
Molecular Formula C32H34N2O11S
CAS No. 1807518-76-8
Storage -20°C in the dark
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