The CAS Registry Mumber 41719-61-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,7,1 and 9 respectively; the second part has 2 digits, 6 and 1 respectively. Calculate Digit Verification of CAS Registry Number 41719-61: (7*4)+(6*1)+(5*7)+(4*1)+(3*9)+(2*6)+(1*1)=113 113 % 10 = 3 So 41719-61-3 is a valid CAS Registry Number.
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