The CAS Registry Mumber 59234-74-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,9,2,3 and 4 respectively; the second part has 2 digits, 7 and 4 respectively. Calculate Digit Verification of CAS Registry Number 59234-74: (7*5)+(6*9)+(5*2)+(4*3)+(3*4)+(2*7)+(1*4)=141 141 % 10 = 1 So 59234-74-1 is a valid CAS Registry Number.
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