The CAS Registry Mumber 363-60-0 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,6 and 3 respectively; the second part has 2 digits, 6 and 0 respectively. Calculate Digit Verification of CAS Registry Number 363-60: (5*3)+(4*6)+(3*3)+(2*6)+(1*0)=60 60 % 10 = 0 So 363-60-0 is a valid CAS Registry Number.