The CAS Registry Mumber 11046-98-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,1,0,4 and 6 respectively; the second part has 2 digits, 9 and 8 respectively. Calculate Digit Verification of CAS Registry Number 11046-98: (7*1)+(6*1)+(5*0)+(4*4)+(3*6)+(2*9)+(1*8)=73 73 % 10 = 3 So 11046-98-3 is a valid CAS Registry Number.