423772-72-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 423772-72-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,2,3,7,7 and 2 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 423772-72:
(8*4)+(7*2)+(6*3)+(5*7)+(4*7)+(3*2)+(2*7)+(1*2)=149
149 % 10 = 9
So 423772-72-9 is a valid CAS Registry Number.
423772-72-9Relevant academic research and scientific papers
Elwahy, Ahmed H.M.
, p. 711 - 714 (2002)
A synthesis of dumbbell-shaped alkynyl-bridged diazulenyl compounds 8, 9 as well as the triazulenylbenzene derivative 12 starting from 1-ethynyl-3-(2,3,4,5-tetraphenylphenyl)azulene (5) is described.
