The CAS Registry Mumber 439927-96-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,9,9,2 and 7 respectively; the second part has 2 digits, 9 and 6 respectively. Calculate Digit Verification of CAS Registry Number 439927-96: (8*4)+(7*3)+(6*9)+(5*9)+(4*2)+(3*7)+(2*9)+(1*6)=205 205 % 10 = 5 So 439927-96-5 is a valid CAS Registry Number.
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