The CAS Registry Mumber 110537-96-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,0,5,3 and 7 respectively; the second part has 2 digits, 9 and 6 respectively. Calculate Digit Verification of CAS Registry Number 110537-96: (8*1)+(7*1)+(6*0)+(5*5)+(4*3)+(3*7)+(2*9)+(1*6)=97 97 % 10 = 7 So 110537-96-7 is a valid CAS Registry Number.