74989-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74989-91-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,9,8 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 74989-91:
(7*7)+(6*4)+(5*9)+(4*8)+(3*9)+(2*9)+(1*1)=196
196 % 10 = 6
So 74989-91-6 is a valid CAS Registry Number.
74989-91-6Relevant articles and documents
Synthesis of Some 1,3,5-Triaryl-2-pyrazolin-4-ones and Their Thio Analogues
Dora, E. K.,Dash, B.,Panda, C. S.
, p. 68 - 70 (2007/10/02)
Reaction of various chalkone dibromides with phenylhydrazine and 2,4-dinitrophenylhydrazine gives quantitatively, the novel 1,3,5-triaryl-4-bromo-2-pyrazolines (I) which are easily converted into 1,3,5-triaryl-2-pyrazolin-4-ones (II) in DMSO at room tempe
