The CAS Registry Mumber 41743-50-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,7,4 and 3 respectively; the second part has 2 digits, 5 and 0 respectively. Calculate Digit Verification of CAS Registry Number 41743-50: (7*4)+(6*1)+(5*7)+(4*4)+(3*3)+(2*5)+(1*0)=104 104 % 10 = 4 So 41743-50-4 is a valid CAS Registry Number.
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