The CAS Registry Mumber 89958-29-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,9,9,5 and 8 respectively; the second part has 2 digits, 2 and 9 respectively. Calculate Digit Verification of CAS Registry Number 89958-29: (7*8)+(6*9)+(5*9)+(4*5)+(3*8)+(2*2)+(1*9)=212 212 % 10 = 2 So 89958-29-2 is a valid CAS Registry Number.
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