The CAS Registry Mumber 400073-93-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,0,0,0,7 and 3 respectively; the second part has 2 digits, 9 and 3 respectively. Calculate Digit Verification of CAS Registry Number 400073-93: (8*4)+(7*0)+(6*0)+(5*0)+(4*7)+(3*3)+(2*9)+(1*3)=90 90 % 10 = 0 So 400073-93-0 is a valid CAS Registry Number.
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