The CAS Registry Mumber 1345457-27-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,4,5,4,5 and 7 respectively; the second part has 2 digits, 2 and 7 respectively. Calculate Digit Verification of CAS Registry Number 1345457-27: (9*1)+(8*3)+(7*4)+(6*5)+(5*4)+(4*5)+(3*7)+(2*2)+(1*7)=163 163 % 10 = 3 So 1345457-27-3 is a valid CAS Registry Number.
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