The CAS Registry Mumber 9032-36-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,3 and 2 respectively; the second part has 2 digits, 3 and 6 respectively. Calculate Digit Verification of CAS Registry Number 9032-36: (6*9)+(5*0)+(4*3)+(3*2)+(2*3)+(1*6)=84 84 % 10 = 4 So 9032-36-4 is a valid CAS Registry Number.