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18197-54-1

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18197-54-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18197-54-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,1,9 and 7 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 18197-54:
(7*1)+(6*8)+(5*1)+(4*9)+(3*7)+(2*5)+(1*4)=131
131 % 10 = 1
So 18197-54-1 is a valid CAS Registry Number.

18197-54-1Downstream Products

18197-54-1Relevant articles and documents

Synthesis of ring-substituted phenyl hydrazinecarboxylates and study of their protonation in dimethyl sulfoxide solutions

Vlasak, Petr,Parik, Patrik,Klicnar, Jiri,Mindl, Jaromir

, p. 793 - 802 (1998)

The pKa values of nineteen phenyl hydrazinecarboxylate hydrochlorides R-C6H4OCONHNH2.HCl (R = H, 3-and 4-Cl, 3-and 4-O2N, 4-Me) and their 1-methyl or 2-methyl derivatives were determined by potentiometric titration with tetrabutylammonium hydroxide in DMSO. IR spectra of the hydrazinecarboxylates and their hydrochlorides revealed that the hydrazinecarboxylate protonation occurs at N2. The methods of synthesis of phenyl hydrazinecarboxylate and their N-methyl derivatives were optimized.

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