The CAS Registry Mumber 112562-01-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,2,5,6 and 2 respectively; the second part has 2 digits, 0 and 1 respectively. Calculate Digit Verification of CAS Registry Number 112562-01: (8*1)+(7*1)+(6*2)+(5*5)+(4*6)+(3*2)+(2*0)+(1*1)=83 83 % 10 = 3 So 112562-01-3 is a valid CAS Registry Number.