The CAS Registry Mumber 114733-90-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,4,7,3 and 3 respectively; the second part has 2 digits, 9 and 0 respectively. Calculate Digit Verification of CAS Registry Number 114733-90: (8*1)+(7*1)+(6*4)+(5*7)+(4*3)+(3*3)+(2*9)+(1*0)=113 113 % 10 = 3 So 114733-90-3 is a valid CAS Registry Number.