The CAS Registry Mumber 96922-16-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,6,9,2 and 2 respectively; the second part has 2 digits, 1 and 6 respectively. Calculate Digit Verification of CAS Registry Number 96922-16: (7*9)+(6*6)+(5*9)+(4*2)+(3*2)+(2*1)+(1*6)=166 166 % 10 = 6 So 96922-16-6 is a valid CAS Registry Number.