The CAS Registry Mumber 14115-04-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,1,1 and 5 respectively; the second part has 2 digits, 0 and 4 respectively. Calculate Digit Verification of CAS Registry Number 14115-04: (7*1)+(6*4)+(5*1)+(4*1)+(3*5)+(2*0)+(1*4)=59 59 % 10 = 9 So 14115-04-9 is a valid CAS Registry Number.