The CAS Registry Mumber 14485-61-1 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 1 respectively. Calculate Digit Verification of CAS Registry Number 14485-61: (7*1)+(6*4)+(5*4)+(4*8)+(3*5)+(2*6)+(1*1)=111 111 % 10 = 1 So 14485-61-1 is a valid CAS Registry Number.