The CAS Registry Mumber 727704-79-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,2,7,7,0 and 4 respectively; the second part has 2 digits, 7 and 9 respectively. Calculate Digit Verification of CAS Registry Number 727704-79: (8*7)+(7*2)+(6*7)+(5*7)+(4*0)+(3*4)+(2*7)+(1*9)=182 182 % 10 = 2 So 727704-79-2 is a valid CAS Registry Number.
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