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639461-55-5

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639461-55-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 639461-55-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,9,4,6 and 1 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 639461-55:
(8*6)+(7*3)+(6*9)+(5*4)+(4*6)+(3*1)+(2*5)+(1*5)=185
185 % 10 = 5
So 639461-55-5 is a valid CAS Registry Number.

639461-55-5Downstream Products

639461-55-5Relevant articles and documents

Synthesis of Mixed Bisamides of Cyclic ortho-Dicarboxylic Acids

Idrisova

, p. 190 - 193 (2003)

A procedure was developed for preparation of bisamides of cyclic ortho-dicarboxylic acids by acylation of m- or p-phenylenediamine in acetone solution at room temperature simultaneously with two different anhydrides of cyclic or aromatic ortho-dicarboxylic acids; another process consisted in treating an anhydride of aromatic or cyclic dicarboxylic acid with monoamide of cis-4-cyclohexene-1,2-dicarboxylic acid in dimethylformamide at room temperature.

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