The CAS Registry Mumber 151159-57-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,1,1,5 and 9 respectively; the second part has 2 digits, 5 and 7 respectively. Calculate Digit Verification of CAS Registry Number 151159-57: (8*1)+(7*5)+(6*1)+(5*1)+(4*5)+(3*9)+(2*5)+(1*7)=118 118 % 10 = 8 So 151159-57-8 is a valid CAS Registry Number.
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