The CAS Registry Mumber 57285-14-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,2,8 and 5 respectively; the second part has 2 digits, 1 and 4 respectively. Calculate Digit Verification of CAS Registry Number 57285-14: (7*5)+(6*7)+(5*2)+(4*8)+(3*5)+(2*1)+(1*4)=140 140 % 10 = 0 So 57285-14-0 is a valid CAS Registry Number.