The CAS Registry Mumber 114908-48-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,4,9,0 and 8 respectively; the second part has 2 digits, 4 and 8 respectively. Calculate Digit Verification of CAS Registry Number 114908-48: (8*1)+(7*1)+(6*4)+(5*9)+(4*0)+(3*8)+(2*4)+(1*8)=124 124 % 10 = 4 So 114908-48-4 is a valid CAS Registry Number.