The CAS Registry Mumber 754201-35-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,5,4,2,0 and 1 respectively; the second part has 2 digits, 3 and 5 respectively. Calculate Digit Verification of CAS Registry Number 754201-35: (8*7)+(7*5)+(6*4)+(5*2)+(4*0)+(3*1)+(2*3)+(1*5)=139 139 % 10 = 9 So 754201-35-9 is a valid CAS Registry Number.
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