The CAS Registry Mumber 7396-69-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,3,9 and 6 respectively; the second part has 2 digits, 6 and 9 respectively. Calculate Digit Verification of CAS Registry Number 7396-69: (6*7)+(5*3)+(4*9)+(3*6)+(2*6)+(1*9)=132 132 % 10 = 2 So 7396-69-2 is a valid CAS Registry Number.