503810-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 503810-57-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,3,8,1 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 503810-57:
(8*5)+(7*0)+(6*3)+(5*8)+(4*1)+(3*0)+(2*5)+(1*7)=119
119 % 10 = 9
So 503810-57-9 is a valid CAS Registry Number.
503810-57-9Relevant academic research and scientific papers
A new synthetic approach to azuleno[1,2-c]-thiophenes
Imafuku, Kimiaki,Wang, Dao-Lin
, p. 405 - 419 (2007/10/03)
A variety of methyl 3-acetyl-2-bromomethylazulene-1-carboxylates (4aa-ae) and 3-acetyl-2-bromomethylazulene-1-carbonitriles (4ba-be) were obtained by the bromination of the corresponding 1-methoxycarbonyl- and 1-cyano-substituted 3-acetyl-2-methylazulenes
