The CAS Registry Mumber 5260-72-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,2,6 and 0 respectively; the second part has 2 digits, 7 and 2 respectively. Calculate Digit Verification of CAS Registry Number 5260-72: (6*5)+(5*2)+(4*6)+(3*0)+(2*7)+(1*2)=80 80 % 10 = 0 So 5260-72-0 is a valid CAS Registry Number.
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