The CAS Registry Mumber 132463-32-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,2,4,6 and 3 respectively; the second part has 2 digits, 3 and 2 respectively. Calculate Digit Verification of CAS Registry Number 132463-32: (8*1)+(7*3)+(6*2)+(5*4)+(4*6)+(3*3)+(2*3)+(1*2)=102 102 % 10 = 2 So 132463-32-2 is a valid CAS Registry Number.