M 3 2 6 _ 0X37 ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE___________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-600. (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: The 3M production lot number was Belgium 2367.

ENTRAL RESEARCH & DEVELOPMENT DEPARTMENT Haskell Laboratory for Toxicology and Industrial Medicine 4/LZ-Z&-l&l4 cc: P.

A R W -o H IJ ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity: [2-(N-Ethylperfluorooctanesulfonamido) ethyl acrylate; may also be referred to as B1228, D-1, EtFOSEA, or FX-13. (2-Propenoic acid, 2[ethyl[heptadecafluorooctyl)sulfonyl]amino]ethyl ester, CAS # 423-82- 5) Remarks: Material is an amber solid.

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M AL6 - O Z ^ O ACTIVATED SLUDGE RESPIRATION INHIBITION TEST TEST SUBSTANCE________________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FX-601. (1Octanesulfonic acid) (CAS # 2795-39-3).

8 PP ANALYTICAL BIOCHEMISTRY 118, 336 343 (1981) AR226-1440 Characterization of Ftuorinated Metabolites by a Gas ChromatographicHelium Microwave Plasma Detector-- The Biotransformation of 1H, 1H,2/-/,2H-PerfluorodecanoI to Perfluorooctanoate D o n a l d F.

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AR226-2929 FOR DU PONT USE ONLY HLR 411-85 HASKELL LABORATORY REPORT NO. 411-85 Title of Report STATIC ACUTE 48-HOUR EC501 OF TO Daphnia magna E.

M &Z6 - ACUTE TOXICITY TO FISH (FATHEAD MINNOW) TEST SUBSTANCE___________________________________________ Identity: A mixture containing perfluorcoctanesulfonate, which may also be referred to as PFOS, FC-95, or as a component of FC-600. (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: The 3M production lot number was 628.

ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity: Perfluorodecanesulfonate, ammonium salt; may also be referred to as PFDS, FC-121-X, or3M Sample E2112and E2566-1. (1Decanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-heneicosafluoro-, ammonium salt, CAS # 67906-42-7) Remarks: Test sample is a mixture of the test substance in water and 2propanol, 1-(1,1-dimethylethoxy).

R a .6 _ 0 7 5 5 MICROBIOS M ICROTOX 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-203CE. (1Octanesulfonic acid) (CAS # 2795-39-3).

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FOR DU PONT USE ONLY cc : AR226-2908 .