74274-93-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 74274-93-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,2,7 and 4 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 74274-93:
(7*7)+(6*4)+(5*2)+(4*7)+(3*4)+(2*9)+(1*3)=144
144 % 10 = 4
So 74274-93-4 is a valid CAS Registry Number.
74274-93-4Relevant academic research and scientific papers
FLUORO-SUBSTITUTED BENZO-CROWN POLYETHERS
Haines, Alan H.
, p. 285 - 286 (2007/10/02)
3'4'5'6'-Tetrafluorobenzo-15-crown-5 (1) and 3',4',5',6'-tetrafluorobenzo-18-crown-6 (2) are readily prepared by reaction of hexafluorobenzene with tetra- and pentaethylene glycol, respectively, and show markedly reduced salt-extraction capability compared to hydrocarbon analogues.
