Fluorescein-PEG4-Acid CAS#: 1807518-76-8

Fluorescein-PEG4-Acid Basic information

Product Name:

Fluorescein-PEG4-Acid

Synonyms:

Flurescein-PEG4-COOH
5-FITC-PEG4-COOH
Fluorescein-PEG4-Acid
4,7,10,13-Tetraoxa-16-azaheptadecanoic acid, 17-[(3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl)amino]-17-thioxo-
1-((3',6'-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9'-xanthen]-5-yl)amino)-1-thioxo-5,8,11,14-tetraoxa-2-azaheptadecan-17-oic acid

CAS:

1807518-76-8

MF:

C32H34N2O11S

MW:

654.68

Mol File:

1807518-76-8.mol

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Fluorescein-PEG4-Acid Chemical 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)

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Fluorescein-PEG4-Acid Usage And Synthesis

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.

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