The CAS Registry Mumber 130894-10-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,0,8,9 and 4 respectively; the second part has 2 digits, 1 and 0 respectively. Calculate Digit Verification of CAS Registry Number 130894-10: (8*1)+(7*3)+(6*0)+(5*8)+(4*9)+(3*4)+(2*1)+(1*0)=119 119 % 10 = 9 So 130894-10-9 is a valid CAS Registry Number.