The CAS Registry Mumber 9069-12-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,6 and 9 respectively; the second part has 2 digits, 1 and 2 respectively. Calculate Digit Verification of CAS Registry Number 9069-12: (6*9)+(5*0)+(4*6)+(3*9)+(2*1)+(1*2)=109 109 % 10 = 9 So 9069-12-9 is a valid CAS Registry Number.
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