3M Specialty Materials June 28, 2000 c f yr - - 13M Center S65t.1P7a3u3l, M11N0055144-1000 0300 M 22.6- 062% r&(-5s>, m-o ---aonmmo ---F3aCo coom VIA EXPRESS MAIL Dr.

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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Toxicological Summary PFOS Dietary Chronic Definitive Reproductive Study: Northern Bobwhite 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.

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/H U 7 t03M3> BIOACCUMULATION TEST SUBSTANCE Identity: N-Ethylperfluorooctanesulfonamide; may also be referred to as U1464, EtFOSA, EtPOSA, F-6309, or FX-12. (1Octanesulfonamide, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8heptadecafluoro-N-ethyl-, CAS # 4151-50-2) Remarks: Material is a white solid of uncharacterized purity.

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A R V Lk'W l PFOS: AN EARLY LIFE-STAGE TOXICITY TEST WITH THE FATHEAD MINNOW (.Pimephales promelas) FINAL REPORT WILDLIFE INTERNATIONAL LTD.

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Internal Correspondence dc: V.

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mm-onaBESTCOPY AVAIlABLE Ji:i 1lillSON Ml OK ' : o n i . m o u vs j i : 11tn; l R E C E IV E D Daniel Baugh Institute of Anatomy Department o f Anatomy Offiee o f the Director and Chairman mC5& ..

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