The CAS Registry Mumber 96873-61-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,6,8,7 and 3 respectively; the second part has 2 digits, 6 and 1 respectively. Calculate Digit Verification of CAS Registry Number 96873-61: (7*9)+(6*6)+(5*8)+(4*7)+(3*3)+(2*6)+(1*1)=189 189 % 10 = 9 So 96873-61-9 is a valid CAS Registry Number.
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