The CAS Registry Mumber 962-69-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 9,6 and 2 respectively; the second part has 2 digits, 6 and 9 respectively. Calculate Digit Verification of CAS Registry Number 962-69: (5*9)+(4*6)+(3*2)+(2*6)+(1*9)=96 96 % 10 = 6 So 962-69-6 is a valid CAS Registry Number.