The CAS Registry Mumber 849104-06-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,4,9,1,0 and 4 respectively; the second part has 2 digits, 0 and 6 respectively. Calculate Digit Verification of CAS Registry Number 849104-06: (8*8)+(7*4)+(6*9)+(5*1)+(4*0)+(3*4)+(2*0)+(1*6)=169 169 % 10 = 9 So 849104-06-9 is a valid CAS Registry Number.
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