221136-61-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221136-61-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,3 and 6 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 221136-61:
(8*2)+(7*2)+(6*1)+(5*1)+(4*3)+(3*6)+(2*6)+(1*1)=84
84 % 10 = 4
So 221136-61-4 is a valid CAS Registry Number.