M A H 6 _ 07J+7 BIODEGRADATION (BOD/COD) 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).

A f L SLSL& _ C Q 2 Z ACU TE TO XICITY TO FISH (FATH EAD MINNOW ) T E ST SU B ST A N C E _______________________________________________ Identity: A mixture containing perfluorooctanesulfonate, which may also be referred to as PFO S, FC-95, or as a component of FX-3106. (1Octanesulfonic add) (C A S # 2795-39-3).

AR226-2402 INTEROFFICE MEMORANDUM Dates From?

BIODEGRADATION AR2716-0336 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.

AR 886 - 0918 ACUTE TOXICITY TO AQUATIC INVERTEBRATES (DAPHNIA MAGNA) TEST SUBSTANCE Identity: A mixture containing perfiuorooctanesulfonate, `which may also be referred to as PFOS, FC-95, or as a componenotf FX-3104. (1Octanesulfonic acid) (CAS # 2795-393).

\ AR226-2385 PERSONAL AMD COflFroEblTIAL CC!

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).

Experiment No.: Conducted At: Dates Conducted: Conducted By: Reviewed By: Primary Skin Irritation Test with T-3493 in Albino Rabbits F(-F.EE[B31,-11934 NLJ 0884EB0009 Safety Evaluation Laboratory Riker Laboratories, Inc.

BIODEGRADATION (BOD/COD) TEST SUBSTANCE Identity:A mixturecontainingperfluorooctanesulfonatweh,ich may alsobe referredtoas PFOS, FC-95, or as a component ofFC-780. (1Octanesulfoniaccid)(CAS # 2795-39-3).

DEPARTMENT OF THE NAVY NAVAL RESEARCH LABORATORY W A S H IN G T O N , D.C. 20375 IN R E P L Y R E F E R T O : 6180-373:JTL:ara NRL Prob.

Internal Correspondence de: J.

L->77?

C orporate O ccupational M edicine 3M Center, Building 220-3W-05 St.

AR226-1307-1 PERSONAL S CONFIDENTIAL CC: H.

2 -4 5 C *. 7* nrr c: . t. t:r E . 1. d u P o n t d e N e m o u r s & C o m p a n y W i l m i n g t o n .