The CAS Registry Mumber 55363-73-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,3,6 and 3 respectively; the second part has 2 digits, 7 and 3 respectively. Calculate Digit Verification of CAS Registry Number 55363-73: (7*5)+(6*5)+(5*3)+(4*6)+(3*3)+(2*7)+(1*3)=130 130 % 10 = 0 So 55363-73-0 is a valid CAS Registry Number.
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