121137-90-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121137-90-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,1,3 and 7 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 121137-90:
(8*1)+(7*2)+(6*1)+(5*1)+(4*3)+(3*7)+(2*9)+(1*0)=84
84 % 10 = 4
So 121137-90-4 is a valid CAS Registry Number.
121137-90-4Relevant articles and documents
Reactivity of pyridazin-3(2H) thiones
Kandile,Zaky,Mohamed,Hamad Elgazwy, Abdel-Sattar S.
, p. 334 - 341 (2007/10/03)
4,6-Disubstituted pyridazin-3(2H)-thiones 3a-f were prepared by thiation of 4,6-disubstituted pyridazin-3(2H)-one 1a-f either with thiourea or phosphorus pentasulphide. The reactivity of 3a-f towards nucleophilic and electrophilic species under different