The CAS Registry Mumber 118792-26-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,8,7,9 and 2 respectively; the second part has 2 digits, 2 and 6 respectively. Calculate Digit Verification of CAS Registry Number 118792-26: (8*1)+(7*1)+(6*8)+(5*7)+(4*9)+(3*2)+(2*2)+(1*6)=150 150 % 10 = 0 So 118792-26-0 is a valid CAS Registry Number.