The CAS Registry Mumber 11032-48-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,1,0,3 and 2 respectively; the second part has 2 digits, 4 and 8 respectively. Calculate Digit Verification of CAS Registry Number 11032-48: (7*1)+(6*1)+(5*0)+(4*3)+(3*2)+(2*4)+(1*8)=47 47 % 10 = 7 So 11032-48-7 is a valid CAS Registry Number.