The CAS Registry Mumber 115062-57-2 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, 5 and 7 respectively. Calculate Digit Verification of CAS Registry Number 115062-57: (8*1)+(7*1)+(6*5)+(5*0)+(4*6)+(3*2)+(2*5)+(1*7)=92 92 % 10 = 2 So 115062-57-2 is a valid CAS Registry Number.