The CAS Registry Mumber 7466-80-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,4,6 and 6 respectively; the second part has 2 digits, 8 and 0 respectively. Calculate Digit Verification of CAS Registry Number 7466-80: (6*7)+(5*4)+(4*6)+(3*6)+(2*8)+(1*0)=120 120 % 10 = 0 So 7466-80-0 is a valid CAS Registry Number.
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