The CAS Registry Mumber 54601-79-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,6,0 and 1 respectively; the second part has 2 digits, 7 and 9 respectively. Calculate Digit Verification of CAS Registry Number 54601-79: (7*5)+(6*4)+(5*6)+(4*0)+(3*1)+(2*7)+(1*9)=115 115 % 10 = 5 So 54601-79-5 is a valid CAS Registry Number.
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