The CAS Registry Mumber 112925-31-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,2,9,2 and 5 respectively; the second part has 2 digits, 3 and 1 respectively. Calculate Digit Verification of CAS Registry Number 112925-31: (8*1)+(7*1)+(6*2)+(5*9)+(4*2)+(3*5)+(2*3)+(1*1)=102 102 % 10 = 2 So 112925-31-2 is a valid CAS Registry Number.
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