5021-38-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5021-38-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,0,2 and 1 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 5021-38:
(6*5)+(5*0)+(4*2)+(3*1)+(2*3)+(1*8)=55
55 % 10 = 5
So 5021-38-5 is a valid CAS Registry Number.
5021-38-5Relevant articles and documents
3-ARYL-1,2-DIHYDROQUINOXALINES
Kolos, N.N.,Insuasti, B.,Kiroga, Kh.,Orlov, V.D.
, p. 918 - 922 (2007/10/02)
The reaction between o-phenylenediamine and its 4-chloro- and 3,5-dichloro-derivatives and 4-substituted ω-bromoacetophenones gives 1,2-dihydroquinoxalines.It has been found that the preferred course of the reaction under basic catalytic conditions involv