The CAS Registry Mumber 11075-36-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,1,0,7 and 5 respectively; the second part has 2 digits, 3 and 6 respectively. Calculate Digit Verification of CAS Registry Number 11075-36: (7*1)+(6*1)+(5*0)+(4*7)+(3*5)+(2*3)+(1*6)=68 68 % 10 = 8 So 11075-36-8 is a valid CAS Registry Number.