The CAS Registry Mumber 14485-67-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,4,8 and 5 respectively; the second part has 2 digits, 6 and 7 respectively. Calculate Digit Verification of CAS Registry Number 14485-67: (7*1)+(6*4)+(5*4)+(4*8)+(3*5)+(2*6)+(1*7)=117 117 % 10 = 7 So 14485-67-7 is a valid CAS Registry Number.