80921-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 80921-57-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,9,2 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 80921-57:
(7*8)+(6*0)+(5*9)+(4*2)+(3*1)+(2*5)+(1*7)=129
129 % 10 = 9
So 80921-57-9 is a valid CAS Registry Number.
80921-57-9Relevant articles and documents
THIAPYRYLIUM AND PYRYLIUM SALTS WITH FURYL SUBSTITUENTS
Kharchenko, V. G.,Burov, E. V.,Sedavkina, V. A.
, p. 1168 - 1170 (2007/10/02)
The possibility of obtaining pyrylium and thiapyrylium salts that contain acidophobic furyl substituents by the action of protic acids on the corresponding 1,5-diketones in acetic acid or methanol, depending on the position of the furan rings relative to
