139155-61-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 139155-61-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,1,5 and 5 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 139155-61:
(8*1)+(7*3)+(6*9)+(5*1)+(4*5)+(3*5)+(2*6)+(1*1)=136
136 % 10 = 6
So 139155-61-6 is a valid CAS Registry Number.
139155-61-6Relevant articles and documents
Zinc promoted regioselective friedel-crafts acylation of electron rich arenes
Meshram,Reddy, Gondi Sudershan,Muralidhar Reddy,Yadav
, p. 2203 - 2206 (1998)
A simple and convenoent zinc promoted selective Friedel-Crafts acylation is described. The inexpensive metal grade catalyst and minimum waste effluent are the important features of the procedure.