The CAS Registry Mumber 57849-69-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,8,4 and 9 respectively; the second part has 2 digits, 6 and 9 respectively. Calculate Digit Verification of CAS Registry Number 57849-69: (7*5)+(6*7)+(5*8)+(4*4)+(3*9)+(2*6)+(1*9)=181 181 % 10 = 1 So 57849-69-1 is a valid CAS Registry Number.
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