543686-21-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 543686-21-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,3,6,8 and 6 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 543686-21:
(8*5)+(7*4)+(6*3)+(5*6)+(4*8)+(3*6)+(2*2)+(1*1)=171
171 % 10 = 1
So 543686-21-1 is a valid CAS Registry Number.
543686-21-1Relevant articles and documents
Fe3+-exchanged clay catalyzed transamidation of amides with amines under solvent-free condition
Ayub Ali, Md.,Hakim Siddiki,Kon, Kenichi,Shimizu, Ken-Ichi
, p. 1316 - 1319 (2014)
Fe3+-exchanged montmorillonite is shown to be an effective and reusable heterogeneous catalyst for the transamidation of various amides and amines under solvent-free condition. The catalyst shows high yields and wide substrate scope.
