The CAS Registry Mumber 93517-44-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,3,5,1 and 7 respectively; the second part has 2 digits, 4 and 4 respectively. Calculate Digit Verification of CAS Registry Number 93517-44: (7*9)+(6*3)+(5*5)+(4*1)+(3*7)+(2*4)+(1*4)=143 143 % 10 = 3 So 93517-44-3 is a valid CAS Registry Number.
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