The CAS Registry Mumber 80678-86-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,0,6,7 and 8 respectively; the second part has 2 digits, 8 and 6 respectively. Calculate Digit Verification of CAS Registry Number 80678-86: (7*8)+(6*0)+(5*6)+(4*7)+(3*8)+(2*8)+(1*6)=160 160 % 10 = 0 So 80678-86-0 is a valid CAS Registry Number.
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