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Eosin is a synthetic, xanthene-based dye that exhibits strong fluorescence and is widely used in various applications. It is commonly employed as a pH indicator, staining agent in histology, and as a food coloring agent. Eosin's chemical structure consists of a xanthene ring with a hydroxyl group at the 5th position and a sulfonic acid group at the 4th position, which gives it its characteristic red color. The dye is known for its ability to bind to proteins and other macromolecules, making it useful in the visualization of cellular structures under a microscope. Additionally, eosin's fluorescence properties have led to its use in fluorescence microscopy and as a tracer in various biological assays.

477-63-4

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477-63-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 477-63-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,7 and 7 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 477-63:
(5*4)+(4*7)+(3*7)+(2*6)+(1*3)=84
84 % 10 = 4
So 477-63-4 is a valid CAS Registry Number.

477-63-4Upstream product

477-63-4Relevant academic research and scientific papers

Eosin Y as a Direct Hydrogen-Atom Transfer Photocatalyst for the Functionalization of C?H Bonds

Fan, Xuan-Zi,Rong, Jia-Wei,Wu, Hao-Lin,Zhou, Quan,Deng, Hong-Ping,Da Tan, Jin,Xue, Cheng-Wen,Wu, Li-Zhu,Tao, Hai-Rong,Wu, Jie

, p. 8514 - 8518 (2018)

Eosin Y, a well-known economical alternative to metal catalysts in visible-light-driven single-electron transfer-based organic transformations, can behave as an effective direct hydrogen-atom transfer catalyst for C?H activation. Using the alkylation of C?H bonds with electron-deficient alkenes as a model study revealed an extremely broad substrate scope, enabling easy access to a variety of important synthons. This eosin Y-based photocatalytic hydrogen-atom transfer strategy is promising for diverse functionalization of a wide range of native C?H bonds in a green and sustainable manner.

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