The CAS Registry Mumber 4955-25-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,9,5 and 5 respectively; the second part has 2 digits, 2 and 5 respectively. Calculate Digit Verification of CAS Registry Number 4955-25: (6*4)+(5*9)+(4*5)+(3*5)+(2*2)+(1*5)=113 113 % 10 = 3 So 4955-25-3 is a valid CAS Registry Number.
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