The CAS Registry Mumber 150176-08-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,0,1,7 and 6 respectively; the second part has 2 digits, 0 and 8 respectively. Calculate Digit Verification of CAS Registry Number 150176-08: (8*1)+(7*5)+(6*0)+(5*1)+(4*7)+(3*6)+(2*0)+(1*8)=102 102 % 10 = 2 So 150176-08-2 is a valid CAS Registry Number.