The CAS Registry Mumber 149301-85-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,9,3,0 and 1 respectively; the second part has 2 digits, 8 and 5 respectively. Calculate Digit Verification of CAS Registry Number 149301-85: (8*1)+(7*4)+(6*9)+(5*3)+(4*0)+(3*1)+(2*8)+(1*5)=129 129 % 10 = 9 So 149301-85-9 is a valid CAS Registry Number.
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