The CAS Registry Mumber 112291-72-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,2,2,9 and 1 respectively; the second part has 2 digits, 7 and 2 respectively. Calculate Digit Verification of CAS Registry Number 112291-72: (8*1)+(7*1)+(6*2)+(5*2)+(4*9)+(3*1)+(2*7)+(1*2)=92 92 % 10 = 2 So 112291-72-2 is a valid CAS Registry Number.
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