The CAS Registry Mumber 22248-49-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,2,2,4 and 8 respectively; the second part has 2 digits, 4 and 9 respectively. Calculate Digit Verification of CAS Registry Number 22248-49: (7*2)+(6*2)+(5*2)+(4*4)+(3*8)+(2*4)+(1*9)=93 93 % 10 = 3 So 22248-49-3 is a valid CAS Registry Number.
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