The CAS Registry Mumber 111412-99-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,4,1 and 2 respectively; the second part has 2 digits, 9 and 9 respectively. Calculate Digit Verification of CAS Registry Number 111412-99: (8*1)+(7*1)+(6*1)+(5*4)+(4*1)+(3*2)+(2*9)+(1*9)=78 78 % 10 = 8 So 111412-99-8 is a valid CAS Registry Number.
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