116722-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 116722-20-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,6,7,2 and 2 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 116722-20:
(8*1)+(7*1)+(6*6)+(5*7)+(4*2)+(3*2)+(2*2)+(1*0)=104
104 % 10 = 4
So 116722-20-4 is a valid CAS Registry Number.
116722-20-4Relevant articles and documents
FRIEDEL-CRAFTS ACYLATION OF FERROCENE WITH DERIVATIVES OF AROMATIC DICARBOXYLIC ACIDS
Kaluz, Stefan,Toma, Stefan
, p. 529 - 532 (2007/10/02)
The succesful acylation of ferrocene with methyl ester chlorides of 1,3-, and 1,4-benzenedicarboxylic acids, 2,3-, and 3,4-thiophenedicarboxylic acids, as well as 2,2'-biphenyldicarboxylic acid is described.Attempted acylation of ferrocene with the anhydr