The CAS Registry Mumber 73794-57-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,3,7,9 and 4 respectively; the second part has 2 digits, 5 and 7 respectively. Calculate Digit Verification of CAS Registry Number 73794-57: (7*7)+(6*3)+(5*7)+(4*9)+(3*4)+(2*5)+(1*7)=167 167 % 10 = 7 So 73794-57-7 is a valid CAS Registry Number.
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