The CAS Registry Mumber 120793-45-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,0,7,9 and 3 respectively; the second part has 2 digits, 4 and 5 respectively. Calculate Digit Verification of CAS Registry Number 120793-45: (8*1)+(7*2)+(6*0)+(5*7)+(4*9)+(3*3)+(2*4)+(1*5)=115 115 % 10 = 5 So 120793-45-5 is a valid CAS Registry Number.
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