The CAS Registry Mumber 9047-07-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,4 and 7 respectively; the second part has 2 digits, 0 and 7 respectively. Calculate Digit Verification of CAS Registry Number 9047-07: (6*9)+(5*0)+(4*4)+(3*7)+(2*0)+(1*7)=98 98 % 10 = 8 So 9047-07-8 is a valid CAS Registry Number.
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