The CAS Registry Mumber 898546-13-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,9,8,5,4 and 6 respectively; the second part has 2 digits, 1 and 3 respectively. Calculate Digit Verification of CAS Registry Number 898546-13: (8*8)+(7*9)+(6*8)+(5*5)+(4*4)+(3*6)+(2*1)+(1*3)=239 239 % 10 = 9 So 898546-13-9 is a valid CAS Registry Number.
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