MICROBICS MICROTOX TO XIC ITY TEST TEST SUBSTANCE_______________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-206CE. (1Octanesulfonic acid) (CAS # 2795-39-3).

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AR226-2396 \ V INTEROFFICE MEMORANDUM Dates Promt 29-Aug-1988 03i43pm ANTHONY J, [TONY] PLAYTIS PLAYTIS .

FOR DU PONT USE ONLY AR226-2944 Du Pont HLR 444-89 Study Title Static Acute 96-Hour LC50a o Fathead Minnows (Plmephale to Author David G.

AR226-3374 m HASKELL LABORATORY Common Name: Ammonium Perfluorooctanoate (C-8) Chemical Name: Octanoic acid, pentadecafluoro-, ammonium salt CAS Registry No.: 3825-26-1 Chemical Structure: O D cc f 3 - c f 2 - c f 2- c f 2- c f 2- c f 2- c f 2 - - o -+n h 4 Physical Properties: Form: Molecular Weight: Boiling Point: Melting Point: Density: White powder 431 Sublimes @ 110C Recommended AEL 0.01 mg/m3 (8-hour TWA), skin General Toxicity Ammonium perfluorooctanoate (C-8) has moderate acute oral toxicity with an LD50 in rats of 470 mg/kg 1981b).

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TOXICITY TO AQUATIC INVERTABRATES (E.G., DAPHNIDS) ARil-OllO TEST SUBSTANCE Identity: Perfluorooctanesulfonate; may also be referred to as PFOS or FC-95. (1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-, potassium salt, CAS # 2795-39-3) Remarks field: The test substance is a white powder of uncharacterized purity.

i4l.-2fc-03T5 ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE Identify: Perfluorooctanesulfonyl fluoride; may also be referred to as POSF, or FX-8. (1-Octanesulfonyl fluoride, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro-, CAS #30735-7).

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