The CAS Registry Mumber 11119-48-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,1,1,1 and 9 respectively; the second part has 2 digits, 4 and 8 respectively. Calculate Digit Verification of CAS Registry Number 11119-48: (7*1)+(6*1)+(5*1)+(4*1)+(3*9)+(2*4)+(1*8)=65 65 % 10 = 5 So 11119-48-5 is a valid CAS Registry Number.