The CAS Registry Mumber 470474-40-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,7,0,4,7 and 4 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 470474-40: (8*4)+(7*7)+(6*0)+(5*4)+(4*7)+(3*4)+(2*4)+(1*0)=149 149 % 10 = 9 So 470474-40-9 is a valid CAS Registry Number.
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