The CAS Registry Mumber 70279-98-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,0,2,7 and 9 respectively; the second part has 2 digits, 9 and 8 respectively. Calculate Digit Verification of CAS Registry Number 70279-98: (7*7)+(6*0)+(5*2)+(4*7)+(3*9)+(2*9)+(1*8)=140 140 % 10 = 0 So 70279-98-0 is a valid CAS Registry Number.
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