The CAS Registry Mumber 104199-38-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,4,1,9 and 9 respectively; the second part has 2 digits, 3 and 8 respectively. Calculate Digit Verification of CAS Registry Number 104199-38: (8*1)+(7*0)+(6*4)+(5*1)+(4*9)+(3*9)+(2*3)+(1*8)=114 114 % 10 = 4 So 104199-38-4 is a valid CAS Registry Number.
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