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Fluorescein(Resorcinol phthalein)
本产品不向个人销售,仅用作科学研究,不用于任何人体实验及非科研性质的动物实验。
Fluorescein(Resorcinol phthalein)图片
CAS NO:2321-07-5
规格:98%
分子量:332.31
包装与价格:
包装价格(元)
250mg电议
1g电议
5g电议

产品介绍
Fluorescein是一种合成的荧光示踪剂。
CAS:2321-07-5
分子式:C20H12O5
分子量:332.31
纯度:98%
存储:Store at -20°C

Background:

Fluorescein is a synthetic fluorescent tracer.


The fluorescein dye is a common fluorescent probe. Its very high molar absorptivity at the wavelength of the argon laser (488 nm), large fluorescence quantum yield and high photostability makes it a very useful and sensitive fluorescent label. Fluorescein is commercially available in many derivatives, such as fluorescein isothiocyanate and fluorescein succinimidyl ester, that can be covalently attached to macromolecules and to amino acids. The labeled molecules can be detected with very high sensitivity which is utilized in, for example, capillary electrophoresis. The emission spectrum of fluorescein overlaps extensively the absorption spectrum of tetramethyl rhodamine, which is a related strongly fluorescent dye, making this pair very suitable for energy transfer experiments to determine distances within and between labeled macromolecules. Fluorescein in aqueous solution occurs in cationic, neutral, anionic and dianionic forms making its absorption and fluoresence properties strongly pH dependent[1].



[1]. R Sj?back, et al. Absorption and fluorescence properties of fluorescein. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy