The CAS Registry Mumber 119845-00-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,9,8,4 and 5 respectively; the second part has 2 digits, 0 and 0 respectively. Calculate Digit Verification of CAS Registry Number 119845-00: (8*1)+(7*1)+(6*9)+(5*8)+(4*4)+(3*5)+(2*0)+(1*0)=140 140 % 10 = 0 So 119845-00-0 is a valid CAS Registry Number.