The CAS Registry Mumber 62051-06-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,2,0,5 and 1 respectively; the second part has 2 digits, 0 and 6 respectively. Calculate Digit Verification of CAS Registry Number 62051-06: (7*6)+(6*2)+(5*0)+(4*5)+(3*1)+(2*0)+(1*6)=83 83 % 10 = 3 So 62051-06-3 is a valid CAS Registry Number.