21549-06-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21549-06-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,4 and 9 respectively; the second part has 2 digits, 0 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21549-06:
(7*2)+(6*1)+(5*5)+(4*4)+(3*9)+(2*0)+(1*6)=94
94 % 10 = 4
So 21549-06-4 is a valid CAS Registry Number.
21549-06-4Relevant academic research and scientific papers
1-ETHYLTHIO-2,3,3-TRIARYLISOINDOLINIUM SALTS AND THEIR REACTIONS WITH NUCLEOPHILIC REAGENTS
Oparin, D. A.
, p. 165 - 168 (2007/10/02)
Stable 1-ethylthioisoindolinium salts were obtained by alkylation of 2-phenyl-3,3-diaryl-1-thiophthalimidines with triethyloxonium tetrafluoroborate.The reactions of these salts with O-, N-, and C-nucleophiles were studied.
