The CAS Registry Mumber 942474-73-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,4,2,4,7 and 4 respectively; the second part has 2 digits, 7 and 3 respectively. Calculate Digit Verification of CAS Registry Number 942474-73: (8*9)+(7*4)+(6*2)+(5*4)+(4*7)+(3*4)+(2*7)+(1*3)=189 189 % 10 = 9 So 942474-73-9 is a valid CAS Registry Number.
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