The CAS Registry Mumber 115062-63-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,5,0,6 and 2 respectively; the second part has 2 digits, 6 and 3 respectively. Calculate Digit Verification of CAS Registry Number 115062-63: (8*1)+(7*1)+(6*5)+(5*0)+(4*6)+(3*2)+(2*6)+(1*3)=90 90 % 10 = 0 So 115062-63-0 is a valid CAS Registry Number.