The CAS Registry Mumber 7200-29-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,2,0 and 0 respectively; the second part has 2 digits, 2 and 9 respectively. Calculate Digit Verification of CAS Registry Number 7200-29: (6*7)+(5*2)+(4*0)+(3*0)+(2*2)+(1*9)=65 65 % 10 = 5 So 7200-29-5 is a valid CAS Registry Number.
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