The CAS Registry Mumber 95695-13-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,5,6,9 and 5 respectively; the second part has 2 digits, 1 and 3 respectively. Calculate Digit Verification of CAS Registry Number 95695-13: (7*9)+(6*5)+(5*6)+(4*9)+(3*5)+(2*1)+(1*3)=179 179 % 10 = 9 So 95695-13-9 is a valid CAS Registry Number.