The CAS Registry Mumber 250224-49-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,0,2,2 and 4 respectively; the second part has 2 digits, 4 and 9 respectively. Calculate Digit Verification of CAS Registry Number 250224-49: (8*2)+(7*5)+(6*0)+(5*2)+(4*2)+(3*4)+(2*4)+(1*9)=98 98 % 10 = 8 So 250224-49-8 is a valid CAS Registry Number.
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