The CAS Registry Mumber 89396-77-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,3,9 and 6 respectively; the second part has 2 digits, 7 and 7 respectively. Calculate Digit Verification of CAS Registry Number 89396-77: (7*8)+(6*9)+(5*3)+(4*9)+(3*6)+(2*7)+(1*7)=200 200 % 10 = 0 So 89396-77-0 is a valid CAS Registry Number.
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