The CAS Registry Mumber 14296-96-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,2,9 and 6 respectively; the second part has 2 digits, 9 and 6 respectively. Calculate Digit Verification of CAS Registry Number 14296-96: (7*1)+(6*4)+(5*2)+(4*9)+(3*6)+(2*9)+(1*6)=119 119 % 10 = 9 So 14296-96-9 is a valid CAS Registry Number.