The CAS Registry Mumber 94146-88-0 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, 8 and 8 respectively. Calculate Digit Verification of CAS Registry Number 94146-88: (7*9)+(6*4)+(5*1)+(4*4)+(3*6)+(2*8)+(1*8)=150 150 % 10 = 0 So 94146-88-0 is a valid CAS Registry Number.