The CAS Registry Mumber 14264-79-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,2,6 and 4 respectively; the second part has 2 digits, 7 and 9 respectively. Calculate Digit Verification of CAS Registry Number 14264-79: (7*1)+(6*4)+(5*2)+(4*6)+(3*4)+(2*7)+(1*9)=100 100 % 10 = 0 So 14264-79-0 is a valid CAS Registry Number.