The CAS Registry Mumber 2247-50-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,2,4 and 7 respectively; the second part has 2 digits, 5 and 0 respectively. Calculate Digit Verification of CAS Registry Number 2247-50: (6*2)+(5*2)+(4*4)+(3*7)+(2*5)+(1*0)=69 69 % 10 = 9 So 2247-50-9 is a valid CAS Registry Number.
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