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131928-95-5

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131928-95-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131928-95-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,9,2 and 8 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 131928-95:
(8*1)+(7*3)+(6*1)+(5*9)+(4*2)+(3*8)+(2*9)+(1*5)=135
135 % 10 = 5
So 131928-95-5 is a valid CAS Registry Number.

131928-95-5Relevant articles and documents

Ring-chain tautomerism. Part 10 +. The reaction of oxocarboxylic acids with diazodiphenylmethane

Bowden, Keith,Misic-Vukovic, Milica M.,Ranson, Richard J.

, p. 1601 - 1606 (2007/10/03)

The rate coefficients for the esterification of a series of oxocarboxylic acids with diazodiphenylmethane have been determined in ethanol or 2-methoxyethanol at 30.0°C. These and the rates of reaction with model compounds have been used to estimate the equilibrium constants for ring-chain tautomerism for the oxocarboxylic acids.

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