The CAS Registry Mumber 92911-06-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,2,9,1 and 1 respectively; the second part has 2 digits, 0 and 6 respectively. Calculate Digit Verification of CAS Registry Number 92911-06: (7*9)+(6*2)+(5*9)+(4*1)+(3*1)+(2*0)+(1*6)=133 133 % 10 = 3 So 92911-06-3 is a valid CAS Registry Number.