The CAS Registry Mumber 95846-44-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,5,8,4 and 6 respectively; the second part has 2 digits, 4 and 4 respectively. Calculate Digit Verification of CAS Registry Number 95846-44: (7*9)+(6*5)+(5*8)+(4*4)+(3*6)+(2*4)+(1*4)=179 179 % 10 = 9 So 95846-44-9 is a valid CAS Registry Number.