The CAS Registry Mumber 74763-96-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,7,6 and 3 respectively; the second part has 2 digits, 9 and 6 respectively. Calculate Digit Verification of CAS Registry Number 74763-96: (7*7)+(6*4)+(5*7)+(4*6)+(3*3)+(2*9)+(1*6)=165 165 % 10 = 5 So 74763-96-5 is a valid CAS Registry Number.
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