568-63-8

Usage

Uses

Used in Food Industry:
Acid Red 51 is used as a coloring agent for enhancing the visual appeal of food products such as jams, jellies, and baked goods. Its vibrant red hue contributes to the aesthetic quality of these items, making them more attractive to consumers.
Used in Textile Industry:
In the textile industry, Acid Red 51 serves as a dyeing agent for coloring various fabrics and materials. Its ability to impart a rich red color makes it a popular choice for manufacturers looking to create visually striking textiles.
However, due to the potential health risks associated with Acid Red 51, strict regulations and limits on its use have been established across industries to ensure consumer safety and minimize exposure to these risks.

InChI:InChI=1/C20H8I4O5.2Na/c21-11-5-9-13(7-3-1-2-4-8(7)20(27)28)10-6-12(22)17(26)15(24)19(10)29-18(9)14(23)16(11)25;;/h1-6,25H,(H,27,28);;/q;2*+1/p-2

Synthetic route

silver (I) ion (14701-21-4) + erythrosin (568-63-8) → 2Ag(1+)*C20H6I4O5(2-)=Ag2C20H6I4O5

Conditions	Yield
In water 25°C, constant ionic strength (KNO3), various concns. of dye; no isolation, identification by potentiometric titration of dye soln. by AgNO3;

erythrosin (568-63-8) + silver nitrate → 2Ag(1+)*C20H6I4O5(2-)=Ag2C20H6I4O5

Conditions	Yield
In water excess of AgNO3; ppt. washed, dried;

Upstream product

• 568-63-8 erythrosin 

Downstream Products

• 69254-43-9 C₂₀H₇I₄O₅^(2-)*2Na⁽¹⁺⁾ 

Relevant academic research and scientific papers

A Nanosecond Laser Flash Photolysis Study of Intramicellar Reactions in the Erythrosin B/CTAB Aqueous System

Both "fast", occurring within 1 μs after excitation, and "slow" reactions, occurring in the hundreds of microseconds time scale, were observed following erythrosin B triplet formation in the cationic micellar system cetyltrimethylammonium bromide (CTAB).The "fast" events are shown to occur in multiply occupied micelles and are assigned to bimolecular reactions.The "slow" ones, which have not been studied in detail, are due to first-order deactivation processes of the triplet occurring in singly occupied micelles.The effects of the excitation intensity and occupancy on the fast triplet decay, radical formation, and subsequent geminate recombination have been studied.The triplet disappears with observed rate constants ranging from 5.5 * 1E6 to 3.6 * 1E6 s-1 while the formation of radicals has rate constants varying from 3.3 * 1E7 to 9.1 * 1E6 s-1.Both in triplet decay and in radical formation the increase in rates occurs by increasing the excitation energy and occupancy.The identification of the precursor(s) of radicals is discussed.The geminal radical recombination has a rate constant of 2.1 * 1E6 s-1.