The CAS Registry Mumber 88571-44-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,8,5,7 and 1 respectively; the second part has 2 digits, 4 and 4 respectively. Calculate Digit Verification of CAS Registry Number 88571-44: (7*8)+(6*8)+(5*5)+(4*7)+(3*1)+(2*4)+(1*4)=172 172 % 10 = 2 So 88571-44-2 is a valid CAS Registry Number.
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