The CAS Registry Mumber 72250-03-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,2,5 and 0 respectively; the second part has 2 digits, 0 and 3 respectively. Calculate Digit Verification of CAS Registry Number 72250-03: (7*7)+(6*2)+(5*2)+(4*5)+(3*0)+(2*0)+(1*3)=94 94 % 10 = 4 So 72250-03-4 is a valid CAS Registry Number.
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