The CAS Registry Mumber 94463-24-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,4,6 and 3 respectively; the second part has 2 digits, 2 and 4 respectively. Calculate Digit Verification of CAS Registry Number 94463-24: (7*9)+(6*4)+(5*4)+(4*6)+(3*3)+(2*2)+(1*4)=148 148 % 10 = 8 So 94463-24-8 is a valid CAS Registry Number.