The CAS Registry Mumber 4695-04-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,9 and 5 respectively; the second part has 2 digits, 0 and 4 respectively. Calculate Digit Verification of CAS Registry Number 4695-04: (6*4)+(5*6)+(4*9)+(3*5)+(2*0)+(1*4)=109 109 % 10 = 9 So 4695-04-9 is a valid CAS Registry Number.