The CAS Registry Mumber 50419-71-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,0,4,1 and 9 respectively; the second part has 2 digits, 7 and 1 respectively. Calculate Digit Verification of CAS Registry Number 50419-71: (7*5)+(6*0)+(5*4)+(4*1)+(3*9)+(2*7)+(1*1)=101 101 % 10 = 1 So 50419-71-1 is a valid CAS Registry Number.
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