The CAS Registry Mumber 52129-13-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,1,2 and 9 respectively; the second part has 2 digits, 1 and 3 respectively. Calculate Digit Verification of CAS Registry Number 52129-13: (7*5)+(6*2)+(5*1)+(4*2)+(3*9)+(2*1)+(1*3)=92 92 % 10 = 2 So 52129-13-2 is a valid CAS Registry Number.
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