The CAS Registry Mumber 38432-03-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,8,4,3 and 2 respectively; the second part has 2 digits, 0 and 3 respectively. Calculate Digit Verification of CAS Registry Number 38432-03: (7*3)+(6*8)+(5*4)+(4*3)+(3*2)+(2*0)+(1*3)=110 110 % 10 = 0 So 38432-03-0 is a valid CAS Registry Number.