Document rx122xb08yQz8vnaV818JMjV0

3M Specialty]AateritiL- May 11,2000 '>M Center St.Paul,h4N 55144-IOW 651733 1100 Mr. CharlesAuer US EPA/OPPT/CCD (7405) 401 M Street,SW Room 403 (EastTower) Washington, DC 20460 Dear Charlie: Pursuanttoour recentcommunications,3M issendingyou thisadditionalinformationrelatintgo -perfluorooctylsulfon(aPtFeOS) salts.We areprovidingthisinformationtoyou on a voluntary basisaspartof our continuingdiscussionswith EPA regardingfluorochemistry. TABLE I CAS Number 29081-56-9 29457-72-5 2795-39-3 70225-148 3M ProductDesignation FC-93 FC-94 and FC-96 FC-95 FC-99 Chemical Description Ammonium Perfluorooetylsulfonate Lithium Perfluorooctylsulfonate Potassium Perfluorooetylsulfonate Diethylamino?erfluorooetylsulfonate T'heproductslistedabove areallsoldas the salts.None areused'asreactiveintermediatesin other3M productsnor aretheydeliberatelaydded,exceptasnoted below. The applicationsmade of theCAS Numbers listeidnTable I aredetailedinTable 2. Table 2 CAS NUMBER 2795-39-3 29457-72-5 70225-14-8 29081-56-9 APPLICATION 1 . Film former inFireFightingFoams 2. Mist suppressantforacidb4thsinmetal platingfactories 3. Surfactantinacidetchingprocessesforproductionof circuit boards 1 . Surfactantinallcalinceleaners 2. Emulsifierincommercial floorpolish 3. Mist suppressantforacidbathsinmetal platingfactories 4. Surfactantinacidetchingprocessesforproductionof circuit boards 5. Registeredactiveingredientforinsectcontrol.Used in . formulationsused inbaittraps 1 . Emulsifierincommercial floorpolishes 2. Mist suppressantforacidbathsinmetal platingfactories 3. Surfactantin acidetchingprocessesforproductionofcircuit boards 1 . Surfactantinacidetchingprocessesforproductionofcircuit boards Page 2 Mr. CharlesAuer Itis'apparenftrom Table2 thatmultipluesesmay . be made of any one product.Table3 details-ih'e multipleCAS Numbers which may be used inany one application. Table 3 CASNUMBER 2795-39-3 2795-39-3 29457-72-5 70225-14-8 2795-39-3 29457-72-5 70225-14-8 29081-56-9 29457-72-5 70225-14-8 29457-72-5 29457-72-5 APPLICATION Film formerinFireFightingFoamq Mst suppressantforacidbathsinmetal'platinfgactories Surfactanitnacidetchingprocessesforproductionof circuit boards Emulsifieirncommercialfloorpolishes Surfactantinalkalinceleaners Registeredactiveingredienftorinsectcontrol.Used in Iformulationussed inbaittraps Potassiumperfluorooctylsulfoniastdeliberatealdydedto 3M aqueousfirefightinfgoams (AFFF). These aredescribedinTable4. Table 4 3M AFFF Product FC-201F FC-203 FC-203CF FC-206CF FC401 FC-600 FC-60OF FC-602 FC-603F FC-783F FC-786F FC-4040 FX-9162 % PFOS Potassium Salt perDry Pound 3.0 1.34 1.0 0.67 23.5 1.0 1.0 0.50.5 0.5 0.25 3.0 1.0 Direct3M customerssigr@ficantdliylutetheabove productsbeforeflnaluse. Page 3 Mr. CharlesAuer No otherproductsproducedfrom thefunctionadlerivatizatioofnPOSF contain perfluorooctanseulfonataes a deliberatelaydded ingredient3.M doesnot routinely analyzethesefinalproductsforPFOS. In additionr,ecentanalyticasltudieson core fluorochemicailntermediateussed inthemanufactureofthemajorityofPOSF-based productsdemonstratethepresenceoftracelevelsofPFOS rangingfrom.00071% to ,0042%. As theseintermediateasrefurthereactedand formulatedintofinalproducts,the traceconcentrationosfPFOS couldbe furtherdiluted. However, recentlfyourofthehighestvolume POSF-based productswere analyzedforthe presenceofPFOS inthefinalcommercializedproduct.The resultsarelisteidnTable 5. TABLE5 Product PaperProtector TextileProtector Carl)ePtrotector CarpetProtect-or of Lots Analyzed 15 3 3 2 % PFOS inFinalProduct 0.00005%:L 0.000025 0.0008% 0.0002 0.0003% 0.00007 0.001% 0.001 Pleaseletme know ifyou need fiffffienrformation. Regards, WilliamA- Weppner, Ph.D. Director. EnvironmentaLHealth, Safetyand RegulatoryAffairs 3M SpecialtMyaterialMarkets Group 3M Center,Building236-IB-10 St.PauL MN 55144 651/733-6374