121561-12-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 121561-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,1,5,6 and 1 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 121561-12:
(8*1)+(7*2)+(6*1)+(5*5)+(4*6)+(3*1)+(2*1)+(1*2)=84
84 % 10 = 4
So 121561-12-4 is a valid CAS Registry Number.