The CAS Registry Mumber 9081-69-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,8 and 1 respectively; the second part has 2 digits, 6 and 9 respectively. Calculate Digit Verification of CAS Registry Number 9081-69: (6*9)+(5*0)+(4*8)+(3*1)+(2*6)+(1*9)=110 110 % 10 = 0 So 9081-69-0 is a valid CAS Registry Number.
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