The CAS Registry Mumber 250127-12-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,0,1,2 and 7 respectively; the second part has 2 digits, 1 and 2 respectively. Calculate Digit Verification of CAS Registry Number 250127-12: (8*2)+(7*5)+(6*0)+(5*1)+(4*2)+(3*7)+(2*1)+(1*2)=89 89 % 10 = 9 So 250127-12-9 is a valid CAS Registry Number.
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