The CAS Registry Mumber 14593-00-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,4,5,9 and 3 respectively; the second part has 2 digits, 0 and 0 respectively. Calculate Digit Verification of CAS Registry Number 14593-00: (7*1)+(6*4)+(5*5)+(4*9)+(3*3)+(2*0)+(1*0)=101 101 % 10 = 1 So 14593-00-1 is a valid CAS Registry Number.