83821-40-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 83821-40-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,3,8,2 and 1 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 83821-40:
(7*8)+(6*3)+(5*8)+(4*2)+(3*1)+(2*4)+(1*0)=133
133 % 10 = 3
So 83821-40-3 is a valid CAS Registry Number.
83821-40-3Relevant academic research and scientific papers
The Synthesis of the Monomethyl Isomers of Benzonaphththiophene
Tominaga, Yoshinori,Pratap, Ram,Castle, Raymond N.,Lee, Milton L.
, p. 859 - 863 (2007/10/02)
All isomers of the monomethylbenzonaphththiophenes were synthesized using photocyclization of 3-styrylbenzothiophenes.The 1-, 3-, 4-, and 5-methylbenzonaphthothiophenes were synthesized by irradiation of the corresponding methylated
