The CAS Registry Mumber 1468-47-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,4,6 and 8 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 1468-47: (6*1)+(5*4)+(4*6)+(3*8)+(2*4)+(1*7)=89 89 % 10 = 9 So 1468-47-9 is a valid CAS Registry Number.