The CAS Registry Mumber 53539-39-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,3,5,3 and 9 respectively; the second part has 2 digits, 3 and 9 respectively. Calculate Digit Verification of CAS Registry Number 53539-39: (7*5)+(6*3)+(5*5)+(4*3)+(3*9)+(2*3)+(1*9)=132 132 % 10 = 2 So 53539-39-2 is a valid CAS Registry Number.
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