The CAS Registry Mumber 98263-86-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,2,6 and 3 respectively; the second part has 2 digits, 8 and 6 respectively. Calculate Digit Verification of CAS Registry Number 98263-86: (7*9)+(6*8)+(5*2)+(4*6)+(3*3)+(2*8)+(1*6)=176 176 % 10 = 6 So 98263-86-6 is a valid CAS Registry Number.
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