The CAS Registry Mumber 115078-45-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,5,0,7 and 8 respectively; the second part has 2 digits, 4 and 5 respectively. Calculate Digit Verification of CAS Registry Number 115078-45: (8*1)+(7*1)+(6*5)+(5*0)+(4*7)+(3*8)+(2*4)+(1*5)=110 110 % 10 = 0 So 115078-45-0 is a valid CAS Registry Number.