The CAS Registry Mumber 141893-44-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,1,8,9 and 3 respectively; the second part has 2 digits, 4 and 4 respectively. Calculate Digit Verification of CAS Registry Number 141893-44: (8*1)+(7*4)+(6*1)+(5*8)+(4*9)+(3*3)+(2*4)+(1*4)=139 139 % 10 = 9 So 141893-44-9 is a valid CAS Registry Number.
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2-[[[4-[(heptadecafluorooctyl)oxy]phenyl]sulfonyl]amino]-N,N,N-trimethyl-
, iodide