The CAS Registry Mumber 54632-47-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,6,3 and 2 respectively; the second part has 2 digits, 4 and 7 respectively. Calculate Digit Verification of CAS Registry Number 54632-47: (7*5)+(6*4)+(5*6)+(4*3)+(3*2)+(2*4)+(1*7)=122 122 % 10 = 2 So 54632-47-2 is a valid CAS Registry Number.
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