The CAS Registry Mumber 1031503-50-0 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,3,1,5,0 and 3 respectively; the second part has 2 digits, 5 and 0 respectively. Calculate Digit Verification of CAS Registry Number 1031503-50: (9*1)+(8*0)+(7*3)+(6*1)+(5*5)+(4*0)+(3*3)+(2*5)+(1*0)=80 80 % 10 = 0 So 1031503-50-0 is a valid CAS Registry Number.
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