The CAS Registry Mumber 124159-62-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,4,1,5 and 9 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 124159-62: (8*1)+(7*2)+(6*4)+(5*1)+(4*5)+(3*9)+(2*6)+(1*2)=112 112 % 10 = 2 So 124159-62-2 is a valid CAS Registry Number.
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