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40898-19-9

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40898-19-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 40898-19-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,8,9 and 8 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 40898-19:
(7*4)+(6*0)+(5*8)+(4*9)+(3*8)+(2*1)+(1*9)=139
139 % 10 = 9
So 40898-19-9 is a valid CAS Registry Number.

40898-19-9Relevant articles and documents

Oxidation of Alkynes by Hydrogen Peroxide Catalyzed by Methylrhenium Trioxide

Zhu, Zuolin,Espenson, James H.

, p. 7728 - 7732 (2007/10/03)

The oxidation of alkynes with hydrogen peroxide is catalyzed by methylrhenium tioxide.The reactions can be rationalized by postulating that an oxirene intermediate is formed between a rhenium peroxide and the alkyne.Internal alkynes yield α-diketones and carboxylic acids, the latter from the complete cleavage of the triple bonds.Rearrangement products were observed only for aliphatic alkynes.Terminal alkynes gave carboxylic acids and their derivatives and α-keto acids as the major products, but their yields varied with the solvent used.

Studies on prodrugs. IV. Preparation and characterization of N-(5-substituted 2-oxo-1,3-dioxol-4-yl)methyl norfloxacin

Sakamoto,Ikeda,Kondo,Tsukamoto

, p. 4870 - 4877 (2007/10/02)

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