1221157-11-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1221157-11-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,1,1,5 and 7 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1221157-11:
(9*1)+(8*2)+(7*2)+(6*1)+(5*1)+(4*5)+(3*7)+(2*1)+(1*1)=94
94 % 10 = 4
So 1221157-11-4 is a valid CAS Registry Number.