The CAS Registry Mumber 6272-58-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 6,2,7 and 2 respectively; the second part has 2 digits, 5 and 8 respectively. Calculate Digit Verification of CAS Registry Number 6272-58: (6*6)+(5*2)+(4*7)+(3*2)+(2*5)+(1*8)=98 98 % 10 = 8 So 6272-58-8 is a valid CAS Registry Number.
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