The CAS Registry Mumber 10184-06-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,0,1,8 and 4 respectively; the second part has 2 digits, 0 and 6 respectively. Calculate Digit Verification of CAS Registry Number 10184-06: (7*1)+(6*0)+(5*1)+(4*8)+(3*4)+(2*0)+(1*6)=62 62 % 10 = 2 So 10184-06-2 is a valid CAS Registry Number.