The CAS Registry Mumber 114022-16-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,4,0,2 and 2 respectively; the second part has 2 digits, 1 and 6 respectively. Calculate Digit Verification of CAS Registry Number 114022-16: (8*1)+(7*1)+(6*4)+(5*0)+(4*2)+(3*2)+(2*1)+(1*6)=61 61 % 10 = 1 So 114022-16-1 is a valid CAS Registry Number.