The CAS Registry Mumber 4126-29-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,1,2 and 6 respectively; the second part has 2 digits, 2 and 9 respectively. Calculate Digit Verification of CAS Registry Number 4126-29: (6*4)+(5*1)+(4*2)+(3*6)+(2*2)+(1*9)=68 68 % 10 = 8 So 4126-29-8 is a valid CAS Registry Number.
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