The CAS Registry Mumber 174673-05-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,4,6,7 and 3 respectively; the second part has 2 digits, 0 and 5 respectively. Calculate Digit Verification of CAS Registry Number 174673-05: (8*1)+(7*7)+(6*4)+(5*6)+(4*7)+(3*3)+(2*0)+(1*5)=153 153 % 10 = 3 So 174673-05-3 is a valid CAS Registry Number.
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