138211-92-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138211-92-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,2,1 and 1 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 138211-92:
(8*1)+(7*3)+(6*8)+(5*2)+(4*1)+(3*1)+(2*9)+(1*2)=114
114 % 10 = 4
So 138211-92-4 is a valid CAS Registry Number.
138211-92-4Relevant academic research and scientific papers
A new method for synthesis of 1H-pyrazol-3(2H)-ones
Magedov,Smushkevich
, p. 845 - 848 (2007/10/02)
A new preparative method is reported for the synthesis of 4,5-disubstituted 1,2-dimethyl-1H-pyrazol-3(2H)-ones 5a-e,g-k from N,N-diacyl-N,N'-dimethylhydrazines 1a-e,g,h,j,k. The method is based on the intramolecular formation of thc 4,5-bond in the pyrazo
