The CAS Registry Mumber 84248-33-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,2,4 and 8 respectively; the second part has 2 digits, 3 and 3 respectively. Calculate Digit Verification of CAS Registry Number 84248-33: (7*8)+(6*4)+(5*2)+(4*4)+(3*8)+(2*3)+(1*3)=139 139 % 10 = 9 So 84248-33-9 is a valid CAS Registry Number.
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