The CAS Registry Mumber 12225-04-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,2,2 and 5 respectively; the second part has 2 digits, 0 and 4 respectively. Calculate Digit Verification of CAS Registry Number 12225-04: (7*1)+(6*2)+(5*2)+(4*2)+(3*5)+(2*0)+(1*4)=56 56 % 10 = 6 So 12225-04-6 is a valid CAS Registry Number.
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