The CAS Registry Mumber 876725-95-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,7,6,7,2 and 5 respectively; the second part has 2 digits, 9 and 5 respectively. Calculate Digit Verification of CAS Registry Number 876725-95: (8*8)+(7*7)+(6*6)+(5*7)+(4*2)+(3*5)+(2*9)+(1*5)=230 230 % 10 = 0 So 876725-95-0 is a valid CAS Registry Number.