The CAS Registry Mumber 84929-60-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,9,2 and 9 respectively; the second part has 2 digits, 6 and 0 respectively. Calculate Digit Verification of CAS Registry Number 84929-60: (7*8)+(6*4)+(5*9)+(4*2)+(3*9)+(2*6)+(1*0)=172 172 % 10 = 2 So 84929-60-2 is a valid CAS Registry Number.