The CAS Registry Mumber 32563-62-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,2,5,6 and 3 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 32563-62: (7*3)+(6*2)+(5*5)+(4*6)+(3*3)+(2*6)+(1*2)=105 105 % 10 = 5 So 32563-62-5 is a valid CAS Registry Number.
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