The CAS Registry Mumber 89568-47-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,5,6 and 8 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 89568-47: (7*8)+(6*9)+(5*5)+(4*6)+(3*8)+(2*4)+(1*7)=198 198 % 10 = 8 So 89568-47-8 is a valid CAS Registry Number.
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