The CAS Registry Mumber 34467-14-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,4,4,6 and 7 respectively; the second part has 2 digits, 1 and 4 respectively. Calculate Digit Verification of CAS Registry Number 34467-14: (7*3)+(6*4)+(5*4)+(4*6)+(3*7)+(2*1)+(1*4)=116 116 % 10 = 6 So 34467-14-6 is a valid CAS Registry Number.