The CAS Registry Mumber 94350-06-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,3,5 and 0 respectively; the second part has 2 digits, 0 and 6 respectively. Calculate Digit Verification of CAS Registry Number 94350-06: (7*9)+(6*4)+(5*3)+(4*5)+(3*0)+(2*0)+(1*6)=128 128 % 10 = 8 So 94350-06-8 is a valid CAS Registry Number.