The CAS Registry Mumber 112251-12-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,2,2,5 and 1 respectively; the second part has 2 digits, 1 and 2 respectively. Calculate Digit Verification of CAS Registry Number 112251-12: (8*1)+(7*1)+(6*2)+(5*2)+(4*5)+(3*1)+(2*1)+(1*2)=64 64 % 10 = 4 So 112251-12-4 is a valid CAS Registry Number.
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