The CAS Registry Mumber 98126-30-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,1,2 and 6 respectively; the second part has 2 digits, 3 and 0 respectively. Calculate Digit Verification of CAS Registry Number 98126-30: (7*9)+(6*8)+(5*1)+(4*2)+(3*6)+(2*3)+(1*0)=148 148 % 10 = 8 So 98126-30-8 is a valid CAS Registry Number.
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