The CAS Registry Mumber 40963-06-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,9,6 and 3 respectively; the second part has 2 digits, 0 and 6 respectively. Calculate Digit Verification of CAS Registry Number 40963-06: (7*4)+(6*0)+(5*9)+(4*6)+(3*3)+(2*0)+(1*6)=112 112 % 10 = 2 So 40963-06-2 is a valid CAS Registry Number.