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158956-95-7

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158956-95-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158956-95-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,9,5 and 6 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 158956-95:
(8*1)+(7*5)+(6*8)+(5*9)+(4*5)+(3*6)+(2*9)+(1*5)=197
197 % 10 = 7
So 158956-95-7 is a valid CAS Registry Number.

158956-95-7Downstream Products

158956-95-7Relevant articles and documents

Electrophilic organic selenium reagents - Protonated seleninic acids as precursors for unsymmetrical aromatic selenides

Stuhr-Hansen, Nicolai,S?lling, Theis Ivan,Henriksen, Lars

experimental part, p. 2633 - 2643 (2011/04/25)

Arylselenylations of methylbenzenes, methoxybenzenes and thiophene were smoothly achieved with selenenium ions generated by comproportionation of 1:1 mixtures of p-toluenesulfonic acid salts of seleninic acids and the corresponding diselenides. A series of p-toluenesulfonic salts of seleninic acids were prepared by hydrogen peroxide oxidation of the corresponding diselenides in the presence of p-toluenesulfonic acid. Novel 2-(organylseleno)thiophenes were obtained by heating the protonated seleninic acids with a 50-fold excess of thiophene in glacial acetic acid.

Electrophilic Phenylselenenylation of Thiophenes. Synthesis of Poly(phenylseleno)thiophenes.

Tiecco, Marcello,Testaferri, Lorenzo,Tingoli, Marco,Marini, Francesca,Mariggio, Stefania

, p. 10549 - 10554 (2007/10/02)

The phenylselenenyl sulfate, generated from the oxidation of diphenyl diselenide with ammonium persulfate, easily effects electrophilic aromatic substituttion reactions on thiophene, 2-and 3-methylthiophenes and on 3-bromothiophene.The phenylseleno group

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