The CAS Registry Mumber 849441-04-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,4,9,4,4 and 1 respectively; the second part has 2 digits, 0 and 4 respectively. Calculate Digit Verification of CAS Registry Number 849441-04: (8*8)+(7*4)+(6*9)+(5*4)+(4*4)+(3*1)+(2*0)+(1*4)=189 189 % 10 = 9 So 849441-04-9 is a valid CAS Registry Number.
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