The CAS Registry Mumber 98620-85-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,6,2 and 0 respectively; the second part has 2 digits, 8 and 5 respectively. Calculate Digit Verification of CAS Registry Number 98620-85: (7*9)+(6*8)+(5*6)+(4*2)+(3*0)+(2*8)+(1*5)=170 170 % 10 = 0 So 98620-85-0 is a valid CAS Registry Number.
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