6690-51-3

Usage

Uses

Used in Industrial Applications:
Sudan I is used as a colorant in various industrial applications due to its bright red color and solubility in organic solvents. Its use in these applications is regulated to minimize potential health risks.
Used in Research and Analysis:
In some cases, Sudan I may be used in laboratory settings for research and analysis purposes, particularly in studies related to the detection and analysis of dyes and their effects.
However, it is important to note that due to the potential health risks associated with Sudan I, its use as a food additive has been banned in several countries, including the European Union. There is a continuous effort to limit the presence of Sudan I in the environment and to find safer alternative colorants for both industrial and food applications.

InChI:InChI=1/C12H8N4O5/c17-10-4-1-8(2-5-10)13-14-11-6-3-9(15(18)19)7-12(11)16(20)21/h1-7,17H/b14-13-

Upstream product

• 18300-85-1 2,4-dinitro-benzenediazonium 
• 108-95-2 phenol 
• 97-02-9 2,4-Dinitroanilin 
• 7664-93-9 sulfuric acid 
• 7697-37-2 nitric acid 
• 1689-82-3 4-hydroxyazobenzene 
• 87113-88-0 5-(2,4-dinitrophenylazo)-1,2,3,4,5-pentamethoxycarbonylcyclopentadiene 
• 17440-81-2 triethylammonium 

Downstream Products

• 51640-06-3 4-(2',4'-dinitrophenylazo)-anisole 
• 74324-63-3 1-acetoxy-4-(2,4-dinitro-phenylazo)-benzene 
• 91371-13-0 2,6-dibromo-4-[(E)-(2,4-dinitrophenyl)diazenyl]phenol 
• 17440-81-2 triethylammonium 
• 54261-72-2 2-Nitro-4-(2,4-dinitro-phenylazo)-phenol 

Relevant academic research and scientific papers

Responsive ruthenium complex probe for phosphorescence and time-gated luminescence detection of bisulfite

Sensitive and selective quantification of specific analytes is of great significance in analytical and environmental sciences, as well as in the food industry. Herein, we report the design, synthesis, characterization, and application of a responsive ruth

Solvatochromism of new substituted 4-[(E)-(4-nitrophenyl)diazenyl]phenolate dyes

Studies on the reverse solvatochromism of dyes in pure solvents are of interest to gain a better understanding of the nature of this phenomenon. In this paper, a series of nine compounds, exhibiting phenol and 4-nitrophenyl groups linked with an azo conjugated bridge, was synthesized and characterized. These compounds were deprotonated to generate solvatochromic phenolate dyes. The azo bridge makes the phenol more acidic, in comparison with the related compounds exhibiting a CH[dbnd]CH or CH[dbnd]N bridge in their molecular structure, indicating the electron withdrawing character of the azo bridge. The solvatochromism of the dyes was investigated in 29 solvents and their intense colors in solution were attributed to π-π* electronic transitions, with an intramolecular charge transfer from the phenolate towards the 4-nitroaryl group. The probes exhibited a reversal in their solvatochromism, in a similar fashion to the behavior verified with related dyes presenting CH[dbnd]CH or CH[dbnd]N as the conjugated bridge; however, the azo dyes are much less sensitive to solvent polarity changes. Multiparametric analysis showed that the azo dyes are very sensitive to the acidity of the medium, but still to a lesser degree than the corresponding imine and stilbene dyes, due to the electronegativity of the azo group. The reverse solvatochromism of the dyes is dictated by the electron-donor phenolate and by the electron-acceptor 4-nitroaryl groups, independently of the conjugated bridge, of the additional nitro group and of the nature of substituents in the 2,6-positions of the phenolate groups. Thus, the solvatochromic reversal verified represents a committed step involving the interaction of the nitro and phenolate groups in the probe with the molecules of structurally different solvents.

A method of preparing azo dye through coupling

The invention relates to an azo dye synthetic method, and particularly relates to a method of coupling a weak-alkaline arylamine diazonium salt and a phenol compound under alkaline conditions to prepare azo dye. Weak-alkaline arylamine diazonium salt filt

BASIC PROPERTIES OF 4-ARYLAZO-PHENOLS AND 4-ARYLAZO-ANISOLES

The conditions in which 4-arylazo-phenols and 4-arylazo-anisoles have basic properties have been studied.We have also determined the equilibrium constants of the reactions between 4-arylazo-phenols or 4-arylazo-anisoles with perchloric acid in nitromethane, acetonitrile and acetic acid.Conclusions have been drawn from the influence of the nature of solvent and substituent at the benzene ring on equilibrium constant values.