The CAS Registry Mumber 59469-49-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,9,4,6 and 9 respectively; the second part has 2 digits, 4 and 9 respectively. Calculate Digit Verification of CAS Registry Number 59469-49: (7*5)+(6*9)+(5*4)+(4*6)+(3*9)+(2*4)+(1*9)=177 177 % 10 = 7 So 59469-49-7 is a valid CAS Registry Number.