The CAS Registry Mumber 189262-62-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,2,6 and 2 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 189262-62: (8*1)+(7*8)+(6*9)+(5*2)+(4*6)+(3*2)+(2*6)+(1*2)=172 172 % 10 = 2 So 189262-62-2 is a valid CAS Registry Number.
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