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69724-53-4

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69724-53-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 69724-53-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,7,2 and 4 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 69724-53:
(7*6)+(6*9)+(5*7)+(4*2)+(3*4)+(2*5)+(1*3)=164
164 % 10 = 4
So 69724-53-4 is a valid CAS Registry Number.

69724-53-4Relevant articles and documents

Catalytic guanylation of aliphatic, aromatic, heterocyclic primary and secondary amines using nanocrystalline zinc(II) oxide

Kantam, M. Lakshmi,Priyadarshini,Amal Joseph,Srinivas,Vinu,Klabunde,Nishina, Yuta

experimental part, p. 5730 - 5737 (2012/09/08)

Nanocrystalline ZnO was found to be a highly efficient heterogeneous catalyst for the guanylation of amines with various carbodiimides to afford N,N′,N″-trisubstituted guanidines in excellent yields. Structurally divergent aliphatic, aromatic, heterocyclic primary and secondary amines were converted to the corresponding N,N′,N″-trisubstituted guanidines using optimal conditions. The catalyst was easy to handle even under atmospheric conditions and can be easily recovered by centrifugation and reused for five cycles with consistent activity.

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