The CAS Registry Mumber 126060-07-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,6,0,6 and 0 respectively; the second part has 2 digits, 0 and 7 respectively. Calculate Digit Verification of CAS Registry Number 126060-07: (8*1)+(7*2)+(6*6)+(5*0)+(4*6)+(3*0)+(2*0)+(1*7)=89 89 % 10 = 9 So 126060-07-9 is a valid CAS Registry Number.