The CAS Registry Mumber 122246-14-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,2,2,4 and 6 respectively; the second part has 2 digits, 1 and 4 respectively. Calculate Digit Verification of CAS Registry Number 122246-14: (8*1)+(7*2)+(6*2)+(5*2)+(4*4)+(3*6)+(2*1)+(1*4)=84 84 % 10 = 4 So 122246-14-4 is a valid CAS Registry Number.