The CAS Registry Mumber 36116-08-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,6,1,1 and 6 respectively; the second part has 2 digits, 0 and 8 respectively. Calculate Digit Verification of CAS Registry Number 36116-08: (7*3)+(6*6)+(5*1)+(4*1)+(3*6)+(2*0)+(1*8)=92 92 % 10 = 2 So 36116-08-2 is a valid CAS Registry Number.