The CAS Registry Mumber 95078-61-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,5,0,7 and 8 respectively; the second part has 2 digits, 6 and 1 respectively. Calculate Digit Verification of CAS Registry Number 95078-61: (7*9)+(6*5)+(5*0)+(4*7)+(3*8)+(2*6)+(1*1)=158 158 % 10 = 8 So 95078-61-8 is a valid CAS Registry Number.