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158720-21-9

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158720-21-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 158720-21-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,7,2 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 158720-21:
(8*1)+(7*5)+(6*8)+(5*7)+(4*2)+(3*0)+(2*2)+(1*1)=139
139 % 10 = 9
So 158720-21-9 is a valid CAS Registry Number.

158720-21-9Downstream Products

158720-21-9Relevant articles and documents

Electroorganic Synthesis, 58. Synthesis of Substituted Benzoquinones and their Use for Mediated Electrochemical Conversions

Riering, Helmut,Schaefer, Hans J.

, p. 859 - 874 (2007/10/02)

Hydroxy- (1a-3a) and hydroxyalkyl-substituted benzoquinones (6a-8a, 27a), suited to be immobilized by esterification with polyacrylic acid, are prepared.Their cathodic reduction potential Ep,c (1) correlates linearly with their substituent constant.The cathodic reduction of dioxygen and the palladium(II)-catalyzed anodic oxidation of alkenes are mediated by the benzoquinones 7b, 8b and 27b, respectively. - Key Words: Benzoquinones, substituted / Cyclic voltammetry / Cathodic dioxygen reduction, mediated / Anodic Wacker oxidation, mediated

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