The CAS Registry Mumber 39239-25-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,9,2,3 and 9 respectively; the second part has 2 digits, 2 and 5 respectively. Calculate Digit Verification of CAS Registry Number 39239-25: (7*3)+(6*9)+(5*2)+(4*3)+(3*9)+(2*2)+(1*5)=133 133 % 10 = 3 So 39239-25-3 is a valid CAS Registry Number.
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