The CAS Registry Mumber 74045-62-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,0,4 and 5 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 74045-62: (7*7)+(6*4)+(5*0)+(4*4)+(3*5)+(2*6)+(1*2)=118 118 % 10 = 8 So 74045-62-8 is a valid CAS Registry Number.
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