The CAS Registry Mumber 145167-96-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,5,1,6 and 7 respectively; the second part has 2 digits, 9 and 6 respectively. Calculate Digit Verification of CAS Registry Number 145167-96: (8*1)+(7*4)+(6*5)+(5*1)+(4*6)+(3*7)+(2*9)+(1*6)=140 140 % 10 = 0 So 145167-96-0 is a valid CAS Registry Number.