The CAS Registry Mumber 84832-04-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,8,3 and 2 respectively; the second part has 2 digits, 0 and 4 respectively. Calculate Digit Verification of CAS Registry Number 84832-04: (7*8)+(6*4)+(5*8)+(4*3)+(3*2)+(2*0)+(1*4)=142 142 % 10 = 2 So 84832-04-2 is a valid CAS Registry Number.