The CAS Registry Mumber 52239-68-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,2,3 and 9 respectively; the second part has 2 digits, 6 and 8 respectively. Calculate Digit Verification of CAS Registry Number 52239-68: (7*5)+(6*2)+(5*2)+(4*3)+(3*9)+(2*6)+(1*8)=116 116 % 10 = 6 So 52239-68-6 is a valid CAS Registry Number.
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