The CAS Registry Mumber 132948-38-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,2,9,4 and 8 respectively; the second part has 2 digits, 3 and 8 respectively. Calculate Digit Verification of CAS Registry Number 132948-38: (8*1)+(7*3)+(6*2)+(5*9)+(4*4)+(3*8)+(2*3)+(1*8)=140 140 % 10 = 0 So 132948-38-0 is a valid CAS Registry Number.