The CAS Registry Mumber 95881-70-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,5,8,8 and 1 respectively; the second part has 2 digits, 7 and 0 respectively. Calculate Digit Verification of CAS Registry Number 95881-70: (7*9)+(6*5)+(5*8)+(4*8)+(3*1)+(2*7)+(1*0)=182 182 % 10 = 2 So 95881-70-2 is a valid CAS Registry Number.