S.L Internal Correspondence [Feaegscor=s=e| ARE-0466> I| % D.

AR 426 -- 0834 ACUTE TOXICITY TO FISH (FATHEAD MINNOW) IESTSuBsTANCE Identity: AbemriexfteurrreedcotnotaaisnPinFgOSpe,rfFlCu-o9r5oo,cotranaessualfcoonmapteo,newnhitcohfmFaC-y60a0l.so (he1p-tOacdteacnaefsluulofroon-i,c pacoitda,s1s,i1u,m2,s2a.l3t,,3C,4A,S4.5#.52,769.56-.73.97-,38).8.8- RFCe-m6a0r0ks(:BelgiTuhme).3MCuprrroednutcitnifoonrmloattinounmibnedriwcaatses 2367. it is a The test sample mixture of 1.0% is PFOS, 81.20% water, 12.00% diethylene glycol butyl ether, 1.00% sodium o0c.t8yl5%sulxfaantte,ha2n.g0u0m%,p0ro.p1a%nNe-(S3u-lctholnoreaaflolaymle)rh,e1x.a0m0i%nisuomdichulmordiedcey,l0s.u8lf0a%te, starch, and 0.05 % tolyltriazole.

BACK TO MAIN MICROBIAL RESPIRATION INHIBITION TEST TEST SUBSTANCE Identity: Decafluoro(pentafluoroethyl)cyclohexanesulfonate, DEA salt; may be referred to as CS-2070.

HASKELL LABORATORY AR226-3381 Common Name: Barium Telomer B Sulfonic Acid (Barium TBS) Chemical Name: Poly(difluoromethylene), alpha-fluoro-omega-(2-sulfoethyl)-, barium salt CAS Registry No.: None Chemical Structure: [F - (CFa - CF2)x - CH2 - 0 CH2 - S - O'h Ba4'2 0 where x = 1-10 (average of 4) Physical Properties: Form: Molecular Weight: Boiling Point: Melting Point: Specific Gravity: Vapor Pressure: Dusty White Powder Variable Recommended AEL 1 mg/m3 (8- and 12-hour TWA), skin General Toxicity Barium TBS has slight acute oral toxicity with an ALD in the rat of 2300 mg/kg (DuPont, 1988c).

InternCaolrrespondence To: From: Subject: Date: C" ERCIAL CHEMICALS ANALYTICAL REPORT #346 E.

ACTIVATED SLUDGE RESPIRATION INHIBITION TEST SUBSTANCE Identity:Perfluorooctanesulfonylamido(ethyl)acetmaatye;also be referredtoas PFOSAA, FC-1 28 or as the major component of FC-127, FC-129, FC-109, or FC-109-X.

7ri@@ RETRCOEECXEEI3lCtvVrIr-F--yDD@ Enhanced Elimination of 14 FC-143- C in Rats with Cholestyramine OLOG 3m TOXICOLOGVY-- and Treatment March 5, 1980 Conducted at: D-iring: Conducted by: Report by: Reviewed by: Riker Laboratories, Subsidiary of 3M St.

CHRONIC TOXICITYTO FRESHWATER INVERTABRATES (Daphniamagna) TEST SUBSTANCE IdentityP:effluorooctanaocicda,mmonium saltm;ay alsobe referrteod as PFOA ammonium saltA,mmonium perfluorooctanoateF,C116,FC-126, FC-1 69,or FC-143.

ACUTE TOXICITY TO FISH TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredtoas PFOS, FC-95, or as a component of FC-185F. (1Octanesulfonicacid)(CAS # 2795-39-3) Remarks: The 3M productionlotnumber was 1-2303.

ACUTE TOXICITY TO FISH (MUMMICHOG) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatmea;y alsobe referredto as PFOS, FC-95,or as a component of FC-203C and L-5440. (1-Octanesulfoniaccid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-heptadecapfoltuaosrsoi-u,m salt,CAS # 2795-39-3) Remarks: The 3M productionlotnumber was not noted.The test sample isFC-203C and isreferredto by thetestinglaboratoryas "81-1/8".

MICROBICS MICROTOXC TOXICITY TEST TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may also be referredtoas PFOS, FC-95, oras a component of FC-203CE. (1Octanesulfoniaccid)(CAS # 2795-39-3).

KSatHherVineeiReneh PAD. | 86HQ.0501 - 0373 n3Md: ESneviyonSmerevniacelsTechnology y 9B00 Buash Aa ve 423199 73 ASPOorBotxPM33N31Sst 2 " 6a7M oo orate A AR R26 - 1016 CDoEcRuTmIeFntIEPrDocMeAssIiLng Cee 7407) (Attn: Section 8(c) Coordinator) OUfSfiEcneovifroTnomxeinctSaulbPsrtoatneccetsion Agency 4W0a1shMingSttroene,t,DSCW20460 Tian "ontain No cB RSuel:foTnaStCe,Apo(ta)ssNiOuTmIsCalE, FCoAr:S#Ac2u7t9e5-T3o0x-i3city Honey Bee Studies on Perfluorooctane Dear Sir: 3T0o4ctiasnseusbumliftotniincgatchied,re1su1l,t2s 2f,r3o,m3r,e4c,en4t,5or,a5l,a6n,d6c,o,n7t.ac8t,8ac,u8t-ehteopxitcaidtey cptaeofstsiasupsoeirruofmo-rsmaeltd (wCitAhS pNeor.f2o7r0m5e:d39b.y3C)e-ntcroammScoinelnycereLfaebrorreadtorya5(PCSFLO)S, S-aonndhHountetyonbeYeso.rkTYhOe4t1wo1sLtZu,diUeKs.were "oTbhseercvoinntgacthteobxieceistyfotres9t6inhovuorlsv.edThpaeinretsiunlgtsthoeftbheiessswtiutdhyvsahrioowusthcaotntcheent9r6athioounrsoCfonPtaFcOtS and Liig3y5J)0o)aw.nadstU5hn0ed.ce7lramsbesoi/tfKhicgtahtoeifocnbloassdcsyhifewimeceaitgfihootrn t(sh4ce.h7Ie8nmiteegmdbaeetvieeo)lnoawplietCdhobmaymNiAOstksEiiLnoosnfefto2ar4l.B11e9em7g7B/o)Kt(gacno(yn1t(a9Ic3tCCB) (1985) (oral and contact, ths contact LDSO would be classified as "moderately toxic".

AR226-2927 FOR DUPONT USE ONLY Subchronic Inhalation Toxicity of Haskell Laboratory Report No. 182-85 I MR No, Haskell E.

FOR DU FONT USE ONLY AR226-2942 Du Pont HLR 466-89 Study Title Inhalation Approximate Lethal Concentration (ALC) of\ Author Rudolph Valentine Study Completed On September 6, 1989 Performing Laboratory E.

,A Synthesis and Characterization of N-Ethyl FOSE-14 c December 11, 1980 Conducted at: During: Commercial Chemicals Division and Riker Laboratories, Inc. 3H St.