ZedQ -093RECEIVED OPPT CB1C 03SEP25 September 23, 2003 iSjL*jn / Duftmt Haskell Laboratory for Health and Environmental Sciences Elkton Road.

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MONTHLY REPORT P.

Proven Results.

Wildlife International, Ltd. - 1- Project Number 454A-104 PFOS: A 48-HOUR STATIC ACUTE TOXICITY TEST WITH THE CLADOCERAN {Daphnid magna) ADDENDUM WILDLIFE INTERNATIONAL, LTD.

Wildlife International.

Toxicological Summary PFOS Dietary Chronic Definitive Reproductive Study: Mallard Test Substance: Perfluorooctanesulfonate (PFOS) Structure: 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecafluoro, potassium salt.

AR22-W* 0 STABILITY IN WATER (HYDROLYSIS) TEST SUBSTANCE Identity: N2-(N-methylperfluorooctanesulfonamido)-ethyl acrylate; may also be referred to as N-MeFOSEA, or MeFOSEA. (2-Propenoic acid, 2[[(heptadecafluorooctyl)sulfonyl]methylamino]ethyl ester, CAS # 25268-77-3) Remarks: Material is an amber, waxy solid, coded THAR3F2.

Interoffice Correspondence c :H .E .

HAZLETON WISCONSIN POST OFFI CE BOX 7 545 M A D IS O N .

' CAS Number 31506-32-8 3M Company AfLAaeJ^I Voluntary Use and Exposure Information Profile N-Methyl perfluorooctanesulfonamide I.

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