The CAS Registry Mumber 138252-34-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,2,5 and 2 respectively; the second part has 2 digits, 3 and 4 respectively. Calculate Digit Verification of CAS Registry Number 138252-34: (8*1)+(7*3)+(6*8)+(5*2)+(4*5)+(3*2)+(2*3)+(1*4)=123 123 % 10 = 3 So 138252-34-3 is a valid CAS Registry Number.
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