The CAS Registry Mumber 62196-67-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,2,1,9 and 6 respectively; the second part has 2 digits, 6 and 7 respectively. Calculate Digit Verification of CAS Registry Number 62196-67: (7*6)+(6*2)+(5*1)+(4*9)+(3*6)+(2*6)+(1*7)=132 132 % 10 = 2 So 62196-67-2 is a valid CAS Registry Number.