The CAS Registry Mumber 41943-07-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,1,9,4 and 3 respectively; the second part has 2 digits, 0 and 7 respectively. Calculate Digit Verification of CAS Registry Number 41943-07: (7*4)+(6*1)+(5*9)+(4*4)+(3*3)+(2*0)+(1*7)=111 111 % 10 = 1 So 41943-07-1 is a valid CAS Registry Number.
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