The CAS Registry Mumber 131759-45-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,7,5 and 9 respectively; the second part has 2 digits, 4 and 5 respectively. Calculate Digit Verification of CAS Registry Number 131759-45: (8*1)+(7*3)+(6*1)+(5*7)+(4*5)+(3*9)+(2*4)+(1*5)=130 130 % 10 = 0 So 131759-45-0 is a valid CAS Registry Number.
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