654674-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 654674-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,5,4,6,7 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 654674-81:
(8*6)+(7*5)+(6*4)+(5*6)+(4*7)+(3*4)+(2*8)+(1*1)=194
194 % 10 = 4
So 654674-81-4 is a valid CAS Registry Number.