The CAS Registry Mumber 84012-18-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,0,1 and 2 respectively; the second part has 2 digits, 1 and 8 respectively. Calculate Digit Verification of CAS Registry Number 84012-18: (7*8)+(6*4)+(5*0)+(4*1)+(3*2)+(2*1)+(1*8)=100 100 % 10 = 0 So 84012-18-0 is a valid CAS Registry Number.
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