The CAS Registry Mumber 41059-91-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,0,5 and 9 respectively; the second part has 2 digits, 9 and 1 respectively. Calculate Digit Verification of CAS Registry Number 41059-91: (7*4)+(6*1)+(5*0)+(4*5)+(3*9)+(2*9)+(1*1)=100 100 % 10 = 0 So 41059-91-0 is a valid CAS Registry Number.
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