The CAS Registry Mumber 94146-95-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,1,4 and 6 respectively; the second part has 2 digits, 9 and 5 respectively. Calculate Digit Verification of CAS Registry Number 94146-95: (7*9)+(6*4)+(5*1)+(4*4)+(3*6)+(2*9)+(1*5)=149 149 % 10 = 9 So 94146-95-9 is a valid CAS Registry Number.