12220-21-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 12220-21-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,2,2 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 12220-21:
(7*1)+(6*2)+(5*2)+(4*2)+(3*0)+(2*2)+(1*1)=42
42 % 10 = 2
So 12220-21-2 is a valid CAS Registry Number.