1573-51-9 Usage
General Description
2-[(4-Aminophenyl)azo]-1H-imidazole, also known as Sudan I, is a synthetic azo dye that is commonly used in industrial coloring processes. It is a red to orange powder that is sparingly soluble in water and alcohol. Sudan I has been banned in the European Union and other countries due to its potential carcinogenic and mutagenic effects. Its use in food coloring has also been restricted due to concerns about its health risks. Studies have shown that exposure to Sudan I may increase the risk of certain types of cancer, particularly when ingested over a long period of time. Due to these health concerns, efforts have been made to find alternative, safer coloring agents for use in food and industrial applications.
Check Digit Verification of cas no
The CAS Registry Mumber 1573-51-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,7 and 3 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1573-51:
(6*1)+(5*5)+(4*7)+(3*3)+(2*5)+(1*1)=79
79 % 10 = 9
So 1573-51-9 is a valid CAS Registry Number.
InChI:InChI=1/C9H9N5/c10-7-1-3-8(4-2-7)13-14-9-11-5-6-12-9/h1-6,13H,10H2
1573-51-9Relevant articles and documents
UV-VIS SOLUTION SPECTRA OF 2-ARYLAZOIMIDAZOLES AND OF THEIR 1-N-METHYL DERIVATIVES AS COMPARED WITH THOSE OF THE RESPECTIVE AZOBENZENES. EXEMPLARY APPLICATION OF EMPIRICAL METHODS OF SPECTRAL CHARACTERIZATION OF SOME COMPLEX ARYLAZO SUBSTITUENT GROUPS
Maciejewska, Dorota,Skulski, Lech
, p. 971 - 984 (2007/10/02)
UV-VIS absorption spectra of 2-arylazoimidazoles (A) and 1-N-methyl-2-arylazoimidazoles (B) are discussed and compared with those of the corresponding trans-azobenzenes which were extensively examined in the past. 1-N-Methyl group in B exerts a slight steric hindrance similar to that in 2-methylazobenzene and also diminishes electron-accepting properties of 1-N-methylimidazol-2-ylazo group, as compared with unsubstituted imidazol-2-ylazo group.From spectral substituent and solvent shifts of the K-band in the spectra of monoazo dyes under discussion it has been deduced that the two afore-mentioned complex substituent groups contitute weaker antiauxochromes, as compared with the phenylazo group.
