The CAS Registry Mumber 4134-41-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,1,3 and 4 respectively; the second part has 2 digits, 4 and 1 respectively. Calculate Digit Verification of CAS Registry Number 4134-41: (6*4)+(5*1)+(4*3)+(3*4)+(2*4)+(1*1)=62 62 % 10 = 2 So 4134-41-2 is a valid CAS Registry Number.
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