156680-11-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156680-11-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,6,8 and 0 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 156680-11:
(8*1)+(7*5)+(6*6)+(5*6)+(4*8)+(3*0)+(2*1)+(1*1)=144
144 % 10 = 4
So 156680-11-4 is a valid CAS Registry Number.