The CAS Registry Mumber 618098-34-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,1,8,0,9 and 8 respectively; the second part has 2 digits, 3 and 4 respectively. Calculate Digit Verification of CAS Registry Number 618098-34: (8*6)+(7*1)+(6*8)+(5*0)+(4*9)+(3*8)+(2*3)+(1*4)=173 173 % 10 = 3 So 618098-34-3 is a valid CAS Registry Number.
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