The CAS Registry Mumber 169239-15-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,9,2,3 and 9 respectively; the second part has 2 digits, 1 and 5 respectively. Calculate Digit Verification of CAS Registry Number 169239-15: (8*1)+(7*6)+(6*9)+(5*2)+(4*3)+(3*9)+(2*1)+(1*5)=160 160 % 10 = 0 So 169239-15-0 is a valid CAS Registry Number.
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