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193630-26-1

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193630-26-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 193630-26-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,6,3 and 0 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 193630-26:
(8*1)+(7*9)+(6*3)+(5*6)+(4*3)+(3*0)+(2*2)+(1*6)=141
141 % 10 = 1
So 193630-26-1 is a valid CAS Registry Number.

193630-26-1Relevant articles and documents

3,3-Diarylphthalides. Part I. Friedlaender reaction of 3′-alkylphenolphthaleins

Ruminski

, p. 908 - 914 (2007/10/03)

Friedlaender reaction was investigated, starting from 3′-alkyl-derivatives of phenolphthalein 1-3 (alkyl = Me, Et and i-Pr) and hydroxylamine in strongly alkaline medium. The process was found to give, after acidic hydrolysis of primarily formed anil-type semi-products, a mixture of two 2-aroylbenzoic acids (2-ABAs) in each case. Identification and quantification of 2-ABAs were carried out within RP-HPLC on ODS column. Based on quantitative results, migratory aptitude (MA) parameter values of ionized 4-hydroxy-3-alkylphenyl nuclei were calculated, taking an unsubstituted ionized 4-hydroxyphenyl ring as a standard.

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