1657-16-5 Usage
Description
2-[(p-nitrophenyl)azo]acetoacetanilide, commonly known as Sudan I, is a synthetic organic azo dye characterized by a red-orange color. It is used in various industries due to its vibrant hue and distinctive properties.
Uses
Used in Food Industry:
Sudan I is used as a red-orange dye in the food industry for coloring purposes. However, it has been banned in many countries due to its potential carcinogenic and mutagenic properties, which pose a risk to public health.
Used in Research and Analysis:
Despite its ban in the food industry, Sudan I may still be used in research and analysis for the detection and identification of lipids in various samples. Its chemical properties make it a useful tool in certain laboratory applications.
Used in Industrial Applications:
Sudan I may also be utilized in non-food related industrial applications where its coloring properties are required, such as in the production of certain types of inks, dyes, or coatings. However, strict regulations and safety measures must be adhered to in order to prevent any potential health risks associated with its use.
Check Digit Verification of cas no
The CAS Registry Mumber 1657-16-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,5 and 7 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1657-16:
(6*1)+(5*6)+(4*5)+(3*7)+(2*1)+(1*6)=85
85 % 10 = 5
So 1657-16-5 is a valid CAS Registry Number.
InChI:InChI=1/C16H14N4O4/c1-11(21)15(16(22)17-12-5-3-2-4-6-12)19-18-13-7-9-14(10-8-13)20(23)24/h2-10,15H,1H3,(H,17,22)/b19-18+
1657-16-5Relevant articles and documents
A quantitative one-pot synthesis method for industrial azo pigments with recyclable wastewater
Feng, Guangyuan,Zhu, Meiling,Liu, Lei,Li, Chunbao
supporting information, p. 1769 - 1776 (2019/04/08)
Most industrial azo pigments are synthesized by diazotization in one pot and then coupling in another. This two-pot process has been transformed into a one-pot method by adding granular PTFE (polytetrafluoroethylene) to a mechanically agitated aqueous mixture of NaNO2, HCl, a diazo component and a coupling component. This method avoids the step of using a base or a surfactant to dissolve the coupling component. The reactions were fast and quantitative. The granular PTFE, wastewater and excess HCl were then reused 11 times without deteriorating the reaction rate and product purity. Altogether, 22 industrial pigments and 3 azo compounds were synthesized and the reaction can produce up to 22.7 g of product in the laboratory. Some reactions require less than 2 equiv. of HCl and a mechanism explaining this is proposed. In addition, an o-nitro group effect is advanced to explain the differences in coupling reaction rates for o-, m- and p-nitroaniline.
Synthesis of some new 1-carbamoyl-3-aminophenyl- and 1-carbamoyl-3-amino-(2-chlorophenyl)-5-methyl-4-arylazopyrazoles as possible potential antidiabetics
Jain,Dixit,Pandey
, p. 486 - 489 (2007/10/02)
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