The CAS Registry Mumber 1548832-73-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,5,4,8,8,3 and 2 respectively; the second part has 2 digits, 7 and 3 respectively. Calculate Digit Verification of CAS Registry Number 1548832-73: (9*1)+(8*5)+(7*4)+(6*8)+(5*8)+(4*3)+(3*2)+(2*7)+(1*3)=200 200 % 10 = 0 So 1548832-73-0 is a valid CAS Registry Number.