The CAS Registry Mumber 1025255-71-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,2,5,2,5 and 5 respectively; the second part has 2 digits, 7 and 1 respectively. Calculate Digit Verification of CAS Registry Number 1025255-71: (9*1)+(8*0)+(7*2)+(6*5)+(5*2)+(4*5)+(3*5)+(2*7)+(1*1)=113 113 % 10 = 3 So 1025255-71-3 is a valid CAS Registry Number.
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