5-FITC-PEG4-COOH , 95% , 1807518-76-8

CAS NO.：1807518-76-8

Empirical Formula: C32H34N2O11S

Molecular Weight: 654.68

MDL number: MFCD23726637

PRODUCT Properties

• Boiling point: 873.4±75.0 °C(Predicted)
• Density: 1.49±0.1 g/cm3(Predicted)
• solubility: Soluble in Water, DMSO, DMF, DCM
• pka: 4.28±0.10(Predicted)

Description and Uses

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 HATU) 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.