The CAS Registry Mumber 62008-67-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,2,0,0 and 8 respectively; the second part has 2 digits, 6 and 7 respectively. Calculate Digit Verification of CAS Registry Number 62008-67: (7*6)+(6*2)+(5*0)+(4*0)+(3*8)+(2*6)+(1*7)=97 97 % 10 = 7 So 62008-67-7 is a valid CAS Registry Number.