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198700-42-4

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198700-42-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 198700-42-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,8,7,0 and 0 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 198700-42:
(8*1)+(7*9)+(6*8)+(5*7)+(4*0)+(3*0)+(2*4)+(1*2)=164
164 % 10 = 4
So 198700-42-4 is a valid CAS Registry Number.

198700-42-4Relevant articles and documents

Perfectly branched polyamide dendrons based on 5-(2-aminoethoxy)- isophthalic acid

Voit, Brigitte I.,Wolf, Dieter

, p. 15535 - 15551 (1997)

Perfectly branched polyamide dendrons based on 5-(2-aminoethoxy)- isophthalic acid have been synthesized up to generation 4 following the convergent approach. This involved a repetitive reaction of 5-(2-t- butoxycarbamylethoxy)-isophthalic acid with the two fold excess of 5-(2- aminoethoxy-hydrochloride)-isophthalic acid dimethyl ester and its analogs of higher generation, respectively, using activation and protection methods from the peptide chemistry. The products were characterized via elemental analysis, different spectroscopic methods, gel permeation chromatograpy, and differential scanning calorimetry.

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