The CAS Registry Mumber 112450-22-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,2,4,5 and 0 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 112450-22: (8*1)+(7*1)+(6*2)+(5*4)+(4*5)+(3*0)+(2*2)+(1*2)=73 73 % 10 = 3 So 112450-22-3 is a valid CAS Registry Number.