Fluorescein-PEG4-Acid
- CAS NO.：1807518-76-8
- Empirical Formula: C32H34N2O11S
- Molecular Weight: 654.68
- MDL number: MFCD23726637
- Update Date: 2026-03-18 11:52:23
What is Fluorescein-PEG4-Acid?
Description
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.
Properties of Fluorescein-PEG4-Acid
| 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) |
Safety information for Fluorescein-PEG4-Acid
Computed Descriptors for Fluorescein-PEG4-Acid
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![5-(N'-[2-AMINOETHYL]THIOUREIDOFLUORESCEIN)](https://img.chemicalbook.in/CAS/GIF/75453-82-6.gif)
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