The CAS Registry Mumber 130574-96-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,0,5,7 and 4 respectively; the second part has 2 digits, 9 and 6 respectively. Calculate Digit Verification of CAS Registry Number 130574-96: (8*1)+(7*3)+(6*0)+(5*5)+(4*7)+(3*4)+(2*9)+(1*6)=118 118 % 10 = 8 So 130574-96-8 is a valid CAS Registry Number.