The CAS Registry Mumber 124651-15-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,4,6,5 and 1 respectively; the second part has 2 digits, 1 and 5 respectively. Calculate Digit Verification of CAS Registry Number 124651-15: (8*1)+(7*2)+(6*4)+(5*6)+(4*5)+(3*1)+(2*1)+(1*5)=106 106 % 10 = 6 So 124651-15-6 is a valid CAS Registry Number.
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