The CAS Registry Mumber 94884-10-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,8,8 and 4 respectively; the second part has 2 digits, 1 and 0 respectively. Calculate Digit Verification of CAS Registry Number 94884-10: (7*9)+(6*4)+(5*8)+(4*8)+(3*4)+(2*1)+(1*0)=173 173 % 10 = 3 So 94884-10-3 is a valid CAS Registry Number.