The CAS Registry Mumber 110793-47-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,0,7,9 and 3 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 110793-47: (8*1)+(7*1)+(6*0)+(5*7)+(4*9)+(3*3)+(2*4)+(1*7)=110 110 % 10 = 0 So 110793-47-0 is a valid CAS Registry Number.