The CAS Registry Mumber 58441-58-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,8,4,4 and 1 respectively; the second part has 2 digits, 5 and 8 respectively. Calculate Digit Verification of CAS Registry Number 58441-58: (7*5)+(6*8)+(5*4)+(4*4)+(3*1)+(2*5)+(1*8)=140 140 % 10 = 0 So 58441-58-0 is a valid CAS Registry Number.
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