The CAS Registry Mumber 102250-59-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,2,2,5 and 0 respectively; the second part has 2 digits, 5 and 9 respectively. Calculate Digit Verification of CAS Registry Number 102250-59: (8*1)+(7*0)+(6*2)+(5*2)+(4*5)+(3*0)+(2*5)+(1*9)=69 69 % 10 = 9 So 102250-59-9 is a valid CAS Registry Number.
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